A
Above the Fold
Above the fold is the portion of a web page that is immediately visible without scrolling. The term originates from the newspaper industry. In SEO, this area is important because Google measures how quickly this visible portion loads (Largest Contentful Paint). Place your most important content and call-to-action here. Too many ads above the fold can lead to a ranking penalty.
Algorithm
The Google algorithm is the complex system of rules and calculations that determines which pages appear at which position in the search results. The algorithm weighs hundreds of factors, from relevance and authority to user experience. Google makes thousands of small updates annually and several major core updates that can significantly shift rankings.
Alt Text
Alt text (alternative text) is a description you add to images in your HTML code. Search engines cannot "see" images, so they use alt text to understand what an image depicts. Write descriptive alt text that identifies the subject of the image and includes a keyword where relevant. It also helps visitors who use a screen reader.
AMP (Accelerated Mobile Pages)
AMP is an open-source framework by Google that was developed to make mobile pages load faster. AMP pages use a stripped-down version of HTML with restrictions on JavaScript and CSS. Although Google no longer considers AMP a ranking factor and has removed the separate AMP label from search results, some AMP pages are still used for news articles and recipes.
Anchor Text
Anchor text is the clickable, visible text of a hyperlink. Google uses anchor text as a signal to understand what the linked page is about. Natural anchor text is varied: a mix of brand name, exact keywords, generic text ("click here"), and URLs. Too much exact-match anchor text in backlinks can be seen as manipulative by Google and lead to a penalty.
Authority
Authority in SEO refers to the trustworthiness and credibility a website or page has in the eyes of search engines. A website builds authority through high-quality backlinks from relevant websites, consistent publication of valuable content, and a long track record. The higher your authority, the easier it is to rank new pages. See also: Domain Authority and E-E-A-T.
B
Backlink
A backlink is a link from an external website to your website. Backlinks are one of the most important ranking factors in Google. They function as "votes of confidence": the more high-quality, relevant websites that link to you, the higher Google estimates your authority. Not all backlinks are equal — a link from an authoritative news site is worth more than a hundred links from unknown blogs. Learn more about outsourcing SEO.
Black Hat SEO
Black hat SEO encompasses techniques that violate Google's guidelines to achieve higher rankings faster. Examples include buying links, keyword stuffing, cloaking (showing different content to Google than to visitors), and using doorway pages. These tactics may work in the short term but almost always lead to a penalty where your website disappears from search results.
Bounce Rate
The bounce rate indicates what proportion of your visitors leave your website without taking further action. In Google Analytics 4, this is measured as the percentage of sessions that are not considered "engaged" — meaning they lasted less than 10 seconds, produced no conversion, and did not visit a second page. A high bounce rate may indicate irrelevant content or a poor user experience.
Branded Keywords
Branded keywords are search terms that contain your brand or company name, such as "Searchlab SEO" or "Nike running shoes." You typically rank easily for these because you are the most relevant source. They are valuable because searchers who use your brand name are often already familiar with your business and closer to converting. Monitor branded search volume as an indicator of brand awareness.
Breadcrumbs
Breadcrumbs are a navigation element that shows the hierarchical position of a page within your website, for example: Home > Blog > SEO Tips. They help both visitors and search engines understand your website's structure. Google often displays breadcrumbs in search results instead of the URL, which can increase your CTR. Implement them with schema markup for maximum effect.
Broken Link
A broken link (dead link) is a hyperlink that points to a page that no longer exists, resulting in a 404 error. Broken links are bad for SEO because they disrupt the user experience and waste link equity. Search engine crawlers may also have difficulty fully indexing your site if they encounter dead links. Regularly check for broken links using tools like Screaming Frog or Ahrefs.
C
Canonical URL
A canonical URL tells Google which version of a page is the "original" when the same or similar content is accessible at multiple URLs. You implement this with a <link rel="canonical"> tag in the head of your page. This prevents duplicate content issues and ensures all link equity is directed to a single page. Essential for e-commerce sites with filter options or session parameters in URLs.
Click Depth
Click depth is the number of clicks needed to reach a specific page from the homepage. Pages buried deep in your site structure (more than 3-4 clicks) are crawled less frequently and receive less link equity. Keep important pages within 3 clicks of your homepage for optimal crawl efficiency and indexing.
Cloaking
Cloaking is a black hat SEO technique where you show different content or URLs to search engines than to human visitors. Google considers this a serious violation of their guidelines. An example: a page that shows Google text stuffed with keywords but displays a completely different page to visitors. Cloaking almost always leads to a manual penalty and removal from the index.
Content Hub
A content hub is a structured collection of related content around a core topic, consisting of a pillar page and multiple in-depth articles that interlink with each other. This model shows Google that your website has topical authority on a specific subject. A good example: a main page about "SEO" with subpages on technical SEO, link building, on-page SEO, and keyword research.
Core Update
A core update is a major, broad change to Google's search algorithm that typically occurs several times a year. Core updates can affect the rankings of thousands of websites simultaneously. Google announces them in advance, and they usually roll out over 1-2 weeks. If your rankings drop after a core update, it doesn't necessarily mean you're doing something wrong — it may mean competitors are now offering better content.
Core Web Vitals
Core Web Vitals are three technical metrics Google uses to measure your website's user experience. LCP (Largest Contentful Paint) measures loading speed: the largest content element should load within 2.5 seconds. INP (Interaction to Next Paint) measures responsiveness to interaction. CLS (Cumulative Layout Shift) measures visual stability: elements should not shift during loading. All three are official ranking factors.
Cornerstone Content
Cornerstone content refers to the most important, most comprehensive articles on your website that cover your core topics. These are long, in-depth pages (2,000+ words) that serve as the foundation for your content strategy. All related blog articles link to these cornerstone pages, allowing them to build maximum authority. Ensure they are always up-to-date and represent the best resource on the internet for that topic.
Crawl Budget
Crawl budget is the number of pages Google crawls on your website within a given period. Every website has a limited crawl budget, depending on the site's size and authority. For small websites (fewer than 1,000 pages), crawl budget is rarely an issue. For large websites, it is important not to waste your budget on unimportant pages — block those via robots.txt or noindex.
Crawling
Crawling is the process by which search engine bots (also called spiders or crawlers) systematically scan the internet and visit web pages. Googlebot follows links from page to page and downloads the HTML, images, and other files to analyze them. After crawling comes indexing: storing and organizing the discovered information in the search database.
CTR (Click-Through Rate)
The CTR (click-through rate) is the percentage of people who click on your search result, calculated as: clicks divided by impressions times 100. A higher CTR signals to Google that your result is relevant to the search query. Improve your CTR by optimizing your title tag and meta description with action words, numbers, and a clear value proposition.
D
Dead-end Page
A dead-end page is a page with no internal links to other pages on your website. Visitors who land here have no logical next step, leading to a higher bounce rate. For SEO, it is problematic because link equity stops flowing at this page. Ensure every page contains at least 2-3 relevant internal links to related content or your most important landing pages.
Disavow
The disavow tool in Google Search Console allows you to "disown" unwanted backlinks. If your website is a victim of negative SEO or has a history of spammy link building, you can ask Google to ignore those links. Use the disavow tool only as a last resort and be careful: incorrectly disavowing valuable links can harm your rankings.
Domain Authority
Domain Authority (DA) is a metric developed by Moz that predicts on a scale of 1-100 how well a website will rank in search engines. It is based on the number and quality of backlinks. Important: DA is not a Google metric, but an estimate from a third-party tool. Ahrefs has a similar metric called Domain Rating (DR). Use it for relative comparison, not as an absolute goal.
Dofollow
A dofollow link is a hyperlink that passes link equity (link juice) to the linked page. By default, all links are dofollow unless you explicitly add a nofollow attribute. Dofollow backlinks from relevant, authoritative websites are the most valuable for your SEO. They tell Google: "I endorse this page and vouch for its quality."
Duplicate Content
Duplicate content is identical or nearly identical content that appears at multiple URLs, both within your own website and on other websites. Google will only index one version and ignore the rest. This can be problematic if Google chooses the "wrong" version. Prevent it with canonical tags, 301 redirects, and by giving each page unique, valuable content.
Dwell Time
Dwell time is the amount of time a visitor spends on your page after clicking from search results, before returning to Google. A long dwell time suggests your content is relevant and valuable. While Google has not confirmed dwell time as an official ranking factor, it is widely regarded as an important user signal. Improve it with engaging content, clear structure, and multimedia.
E
E-E-A-T
E-E-A-T stands for Experience, Expertise, Authoritativeness, and Trustworthiness. It is a framework from Google's Search Quality Rater Guidelines used to evaluate content quality. Since December 2022, "Experience" was added: content that demonstrates the author has first-hand experience with the topic is valued higher. Especially important for YMYL topics (Your Money Your Life).
Entity
An entity in SEO is a uniquely identifiable concept — a person, organization, place, or thing — that Google has stored in its Knowledge Graph. Google uses entities to better understand the context and meaning of search queries, independent of exact keywords. By establishing your brand as an entity through Wikipedia, Google Knowledge Panel, and consistent NAP data, you increase your visibility in search results.
Evergreen Content
Evergreen content is content that remains relevant for a long time and does not quickly become outdated. Think of "What is SEO?", "How to create a business plan," or this glossary. Unlike news articles or trend pieces, evergreen content continues generating traffic for months to years. It is the backbone of a sustainable SEO strategy because it delivers compound returns: the investment in creation pays for itself over and over.
Exact Match Domain
An exact match domain (EMD) is a domain name that exactly matches a search term, such as "cheapshoes.com." Google used to give a significant ranking boost to EMDs, but since the EMD update of 2012, this advantage has largely disappeared. An EMD can still work if the website offers quality content, but a strong brand with a unique domain name builds more authority in the long run.
External Link
An external link (outbound link) is a link from your website to another website. Outbound links to relevant, trustworthy sources help Google understand the context of your content and show that you have done thorough research. They are a sign of quality. Be selective: link to authoritative sources and use nofollow for sponsored or untrustworthy links.
F
Featured Snippet
A featured snippet is a highlighted answer that Google displays at the top of search results, above the organic results (position 0). It pulls content directly from a web page and displays it in a block as a paragraph, list, or table. To appear in a featured snippet, answer a question directly and concisely in your content (40-60 words), preferably with an H2 or H3 that contains the question.
Fetch and Render
Fetch and render is a feature in Google Search Console (now the "URL Inspection Tool") that lets you see how Google crawls and renders a specific page. It shows you whether Googlebot can correctly load your page, including JavaScript-generated content. Indispensable for debugging indexing issues and verifying that Google sees your page as you intend.
First Input Delay (FID) / INP
First Input Delay was a Core Web Vital that measured the time between a user's first interaction and the browser's response. Since March 2024, FID has been replaced by INP (Interaction to Next Paint), which measures all interactions throughout the entire page visit rather than just the first. A good INP score is under 200 milliseconds. Optimize by minimizing JavaScript and breaking up long tasks.
Footer Links
Footer links are the links in your website's footer. Google gives less weight to links in the footer than to links in the body text, because footer links are the same on every page (site-wide). They are useful for navigation and legal pages but not ideal for SEO purposes. Avoid placing dozens of keyword-rich links in your footer — that can be seen as manipulative.
G
Google Algorithm Update
A Google algorithm update is a change to the search algorithm that affects website rankings. Google makes small adjustments daily but also releases major named updates like core updates, spam updates, and helpful content updates. After a major update, rankings may fluctuate temporarily. Follow updates through reliable SEO sources and adjust your strategy where needed.
Google Analytics
Google Analytics (GA4) is Google's free web analytics tool that provides insights into your website visitor behavior. You can see where visitors come from, which pages they visit, how long they stay, and whether they convert. For SEO, it is essential to monitor organic traffic, analyze landing page performance, and measure the impact of optimizations. Connect it to Search Console for complete data.
Google Business Profile
Google Business Profile (formerly Google My Business) is a free tool that lets you manage how your business appears in Google Search and Google Maps. For local SEO, it is indispensable: a complete, optimized profile increases your chances of appearing in the Local Pack. Add photos, respond to reviews, publish updates, and keep your business hours current.
Google Penalty
A Google penalty is a manual action Google imposes when your website violates their webmaster guidelines. This can result in lower rankings or complete removal from search results. Common causes include unnatural backlinks, thin content, cloaking, and keyword stuffing. Manual actions are reported in Google Search Console and require a reconsideration request after resolving the issues.
Google Search Console
Google Search Console (GSC) is a free tool from Google that shows you how Google sees your website. It provides data on search performance (clicks, impressions, CTR, positions), indexing status, Core Web Vitals, mobile usability, and manual actions. GSC is the most important SEO dashboard: it shows which keywords drive traffic and where issues are hindering your rankings.
Grey Hat SEO
Grey hat SEO refers to techniques that fall in the grey area between black hat and white hat SEO. They do not explicitly violate Google's guidelines but push the boundaries. Examples include exchanging guest posts purely for links, setting up PBNs (private blog networks), or aggressively requesting link placements. The risk of a penalty is lower than with black hat, but not absent.
H
H1/H2/H3 (Heading Tags)
Heading tags (H1 through H6) give structure to your content and help search engines understand the hierarchy of your page. Use one H1 per page as the main title, H2s for sections, and H3s for subsections. Incorporate relevant keywords naturally in your headings. A clear heading structure not only improves your SEO but also makes your content more scannable for visitors.
Helpful Content Update
The Helpful Content Update is a Google update (2022-2024) that rewards content written for people, not for search engines. Google now evaluates at the site level whether a website predominantly publishes "helpful" content. Websites with lots of thin, AI-generated, or keyword-driven content that adds no real value are penalized. Focus on original insights, personal experience, and content that genuinely helps the searcher.
Hreflang
Hreflang is an HTML attribute that tells Google which language and country a page is intended for. Use it when your website offers content in multiple languages or targets the same language for different countries (for example, English for the US and the UK). Hreflang prevents the wrong language version from appearing in search results and helps Google show the right page to the right user.
HTTPS
HTTPS (Hypertext Transfer Protocol Secure) is the secure version of HTTP that encrypts data between browser and server using an SSL/TLS certificate. Google confirmed HTTPS as a ranking factor in 2014. Websites without HTTPS are marked as "Not Secure" in Chrome, which damages visitor trust. Always migrate to HTTPS and ensure correct 301 redirects from HTTP to HTTPS to prevent duplicate indexing.
I
Impression
An impression in SEO is a display of your website in the search results. Each time your URL appears in the SERP for a search query, it counts as one impression — regardless of whether the user actually sees your result (for results below the fold). In Google Search Console, you can view the number of impressions per keyword and page. Impressions without clicks often indicate a low CTR that needs optimization.
Indexing
Indexing is the process by which Google stores crawled pages in its database (the index). Only indexed pages can appear in search results. A page is not always indexed: Google may decide the quality is too low, the content is duplicate, or the page is blocked via noindex or robots.txt. Check indexing status in Google Search Console.
Information Architecture
Information architecture (IA) is the structural organization of content on your website. Good IA makes it easy for visitors and search engines to find content and understand how pages relate to each other. Think of logical categories, a flat site structure (maximum 3 clicks deep), and consistent navigation. Strong IA forms the foundation of effective internal linking.
Internal Linking
Internal linking refers to hyperlinks that point from one page to another page within the same website. They are crucial for SEO: they help Google understand your site structure, distribute link equity across your pages, and guide visitors to relevant content. Link from blog articles to your most important landing pages and use descriptive anchor text. Consistent internal linking is one of the most underrated SEO techniques.
K
Keyword Cannibalization
Keyword cannibalization occurs when multiple pages on your website compete to rank for the same keyword. Google then does not know which page is most relevant, causing both pages to perform worse than one strong page would. Resolve it by merging pages, setting a clear canonical, or differentiating the focus of pages toward different search intents.
Keyword Density
Keyword density is the percentage a keyword appears relative to the total number of words on a page. A density of 2-3% was once recommended, but modern SEO revolves around natural language use. There is no ideal keyword density — write for people, not algorithms. Google understands synonyms and context (thanks to RankBrain), so vary your word usage naturally.
Keyword Difficulty
Keyword difficulty (KD) is a score that indicates how hard it is to rank in the top 10 for a specific keyword. Tools like Ahrefs, SEMrush, and Moz calculate KD based on the backlink profile of the current top 10 results. A KD of 0-30 is relatively easy, 30-70 is moderate, and 70+ is highly competitive. Start with low KD keywords if your website still has little authority.
Keyword Research
Keyword research is the process of finding and analyzing search terms your target audience uses in search engines. You analyze search volume, competition, search intent, and relevance to your business. Good keyword research forms the basis of your entire SEO and content strategy. Use tools like Google's Keyword Planner, Ahrefs, or SEMrush and focus on keywords with commercial or informational intent that match your offering.
Keyword Stuffing
Keyword stuffing is the practice of unnaturally repeating keywords in your content, meta tags, or hidden text to rank higher. This is an outdated black hat technique that Google now recognizes and penalizes. A page that repeats "buy cheap shoes" twenty times will not rank but will instead receive a penalty. Write naturally and use synonyms and related terms.
Knowledge Graph
The Knowledge Graph is Google's massive database of facts about people, places, organizations, and concepts, and the relationships between them. It powers Knowledge Panels (the information blocks on the right side of search results) and helps Google better understand search intent. For businesses, appearing as an entity in the Knowledge Graph is valuable — it increases your visibility and credibility in search results.
L
Landing Page
A landing page is the page a visitor arrives at via a search query, advertisement, or link. In an SEO context, it is the page you optimize for a specific keyword or cluster of keywords. An effective SEO landing page contains relevant content, a clear heading structure, internal links, and a call-to-action. Every page on your website is potentially a landing page.
LSI (Latent Semantic Indexing)
LSI keywords are semantically related terms that help Google understand the context of your content. If you write about "apple," words like "iPhone," "iOS," and "Steve Jobs" help Google understand you are referring to the technology company, not the fruit. While the term "LSI" is technically outdated, the principle remains relevant: use related terms and synonyms to strengthen your topical relevance.
Link Building
Link building is the active process of acquiring backlinks from other websites to your own. It is one of the three most important ranking factors in Google, alongside content and technical SEO. Effective link building strategies include: creating link-worthy content, digital PR, guest blogging on relevant websites, broken link building, and building relationships with journalists and bloggers. Quality always trumps quantity.
Link Equity (Link Juice)
Link equity (also known as link juice) is the value a link transfers from one page to another. A link from a page with high authority transfers more link equity than a link from an unknown page. Link equity flows through both internal and external links. The more outbound links a page has, the more the equity is diluted. That is why links on pages with few outbound links are especially valuable.
Local Pack
The Local Pack (also known as Map Pack) is the block of three local business results Google displays for search queries with local intent, including a map. Appearing in the Local Pack delivers significantly more visibility and clicks than the regular organic results below it. Optimize for it by improving your Google Business Profile, collecting reviews, and ensuring consistent NAP data.
Log File Analysis
Log file analysis is the practice of analyzing server logs to see how Googlebot crawls your website. You discover which pages are crawled most frequently, which are ignored, what HTTP status codes are returned, and how efficiently your crawl budget is spent. It is an advanced SEO technique that is especially valuable for large websites with thousands of pages.
Long-tail Keyword
A long-tail keyword is a longer, more specific search query with typically lower search volume but higher conversion potential. For example: "best SEO agency in New York for small business" instead of "SEO agency." Long-tail keywords are less competitive, making them ideal for websites that still need to build authority. Together, long-tail keywords often account for the majority of all organic traffic to a website.
M
Meta Description
The meta description is an HTML tag that provides a short summary of your page (maximum 155-160 characters). Google often displays this description in search results beneath your title tag. While it is not a direct ranking factor, a compelling meta description influences your CTR — and thereby indirectly your rankings. Write persuasive copy with a call-to-action and include your primary keyword. Google bolds matching terms.
Meta Robots Tag
The meta robots tag is an HTML element in the head of your page that gives instructions to search engines about how to treat the page. The most commonly used values are "index" (do index), "noindex" (don't index), "follow" (follow links), and "nofollow" (don't follow links). You can also use "noarchive" to prevent Google from showing a cached version.
Mobile-first Indexing
Mobile-first indexing means Google uses the mobile version of your website as the primary version for crawling and indexing. Since 2023, Google applies this to all websites. If your mobile version has less content, fewer internal links, or a worse structure than your desktop version, it can negatively affect your rankings. Ensure your mobile version is fully equivalent in quality to desktop.
Meta Title
See Title Tag.
N
NAP (Name, Address, Phone)
NAP stands for Name, Address, and Phone number. Consistent NAP data across all online listings — your website, Google Business Profile, social media, business directories — is essential for local SEO. Inconsistent data confuses Google and can harm your local rankings. Check this regularly, especially after a move or name change.
Negative SEO
Negative SEO is the deliberate application of black hat techniques to a competitor's website to harm their rankings. Think of building thousands of spammy backlinks to their site or copying their content on other websites. While Google says their algorithms recognize and ignore most negative SEO attacks, it is wise to monitor your backlink profile and have the disavow tool ready.
Nofollow
The nofollow attribute (rel="nofollow") tells search engines not to count a link as a "vote" for the linked page. Use nofollow for sponsored links, advertisements, user-generated content (forum posts, comments), and links to untrustworthy sources. Google now treats nofollow as a "hint" rather than a "directive" — they may still choose to follow the link for crawling purposes.
Noindex
Noindex is a meta tag or HTTP header that instructs search engines not to include a page in their index. Use noindex for pages that don't need to appear in search results: thank-you pages, internal search results, tag pages, or test pages. Note: a noindex page can still be crawled. If you want to prevent crawling, use robots.txt in combination with noindex.
O
Off-page SEO
Off-page SEO encompasses all optimizations outside your own website that influence your rankings. It primarily revolves around link building — acquiring quality backlinks — but also includes brand mentions, social signals, digital PR, and building your online reputation. Off-page SEO largely determines how Google assesses the authority and trustworthiness of your website. It is one half of the SEO puzzle alongside on-page optimization.
On-page SEO
On-page SEO covers all optimizations you make directly on your own website to rank higher. This includes optimizing title tags, meta descriptions, headings, content, images (alt text), URL structure, and internal links. On-page SEO ensures Google understands what your page is about and how relevant it is for specific keywords.
Organic Traffic
Organic traffic is the visitor traffic that comes to your website through unpaid search results in search engines. It is the primary goal of SEO and differs from paid traffic (SEM), direct traffic, and referral traffic. Organic traffic is valuable because it is free (after the initial SEO investment), grows sustainably, and attracts visitors at the moment they are actively searching for what you offer.
Orphan Page
An orphan page is a page on your website that no internal link points to. Because Google crawls your site by following links, orphan pages are often not discovered or indexed late. They also receive no link equity. Identify orphan pages using a crawl tool like Screaming Frog and add them to your navigation or link to them from relevant content.
P
Page Speed
Page speed is how quickly your web page loads in a visitor's browser. It is a confirmed Google ranking factor and part of Core Web Vitals. Fast pages provide a better user experience and have lower bounce rates. Improve your speed by compressing images, minimizing CSS/JavaScript, setting up caching, and using a CDN. Test with Google PageSpeed Insights.
PageRank
PageRank is the original Google algorithm, devised by Larry Page and Sergey Brin, that calculates the authority of a web page based on the quantity and quality of links pointing to it. Although the public PageRank Toolbar was discontinued in 2016, Google internally still uses a (heavily evolved) version of PageRank as part of their ranking system. The concept of link value remains relevant.
Pagination
Pagination is the practice of dividing content across multiple pages, for example with product lists or archive pages (page 1, 2, 3...). Google ended support for rel="next/prev" tags in 2019 but generally still understands pagination through link structure. Ensure all paginated pages are crawlable and consider a "load all" button as an alternative. Do not give paginated pages a canonical to page 1.
People Also Ask
People Also Ask (PAA) is a SERP feature from Google that displays related questions for a search query, each with an expandable answer. PAA questions are a goldmine for content ideas and FAQ sections. To appear in a PAA box, answer frequently asked questions directly and concisely in your content. Each opened PAA generates new questions, making the list grow dynamically.
Pillar Page
A pillar page is a comprehensive page that fully covers a broad topic and serves as a hub for related, more in-depth articles. The pillar page links to all cluster articles, and each cluster article links back to the pillar page. This topic cluster model helps Google recognize your website as an authority on that topic. An effective pillar page is 3,000-5,000 words and covers all facets of the subject.
Position Zero
Position zero is the name for a featured snippet displayed above all organic search results. It gives you maximum visibility in the SERP. Pages that appear at position 0 do not necessarily need to be at position 1 — pages from the top 5 can also be featured. Structure your content with clear questions and answers to be eligible.
R
RankBrain
RankBrain is a machine learning system that is part of Google's search algorithm. It helps Google understand the intent behind search queries, especially for new or ambiguous queries the algorithm has not seen before. RankBrain analyzes patterns in search behavior to assess the relevance of results. It is one of the three most important ranking factors, alongside content and links.
Redirect (301 / 302)
A redirect automatically forwards visitors and search engines from one URL to another. A 301 redirect (permanent) indicates a page has permanently moved and passes approximately 95-99% of link equity. A 302 redirect (temporary) is for temporary moves and does not pass link equity. Always use a 301 for permanent changes to preserve your rankings.
Responsive Design
Responsive design is a web design approach where a website automatically adapts to the screen size of the device — desktop, tablet, or smartphone. Since Google applies mobile-first indexing, responsive design is essential for SEO. A responsive website has one URL per page (no separate mobile URL), which prevents duplicate content and consolidates link equity.
Rich Snippet
A rich snippet is an enriched search result that displays additional visual information alongside the standard title and description, such as star ratings, prices, images, FAQ accordions, or recipe information. Rich snippets are generated based on schema markup (structured data) in your HTML. They significantly increase your CTR because they stand out among regular search results and provide more information.
Robots.txt
The robots.txt file is a text file in the root of your website that gives instructions to search engine crawlers about which parts of your site they may and may not crawl. It is not a security measure (it does not prevent pages from being indexed if links point to them) but a tool to spend your crawl budget efficiently. Use it to block admin pages, search results, and other low-value URLs.
S
Schema Markup
Schema markup (structured data) is code you add to your HTML to help search engines better understand the content of your page. It uses the Schema.org vocabulary and can be implemented in JSON-LD, Microdata, or RDFa format (JSON-LD is preferred). Schema markup enables rich snippets and helps Google classify your content as an article, product, FAQ, review, event, or organization.
Search Intent
See User Intent.
SEO (Search Engine Optimization)
SEO (search engine optimization) is the collection of techniques and strategies to make your website rank higher in the organic (unpaid) search results of search engines like Google. SEO encompasses three pillars: technical SEO (crawlability, speed), on-page SEO (content, structure), and off-page SEO (backlinks, authority). The goal is to drive more relevant traffic to your website. Considering outsourcing your SEO?
SEO Audit
An SEO audit is a comprehensive analysis of your website's technical health, content, and backlink profile to identify areas for improvement in search engine optimization. An audit checks crawlability, indexing status, page speed, mobile usability, on-page optimization, duplicate content, broken links, and the quality of your backlink profile, among other factors. It is the starting point of any serious SEO campaign.
SERP (Search Engine Results Page)
The SERP is the page a search engine displays after a search query is entered. The modern Google SERP contains much more than just ten blue links: you see ads, featured snippets, People Also Ask, Knowledge Panels, images, videos, local results, and more. Analyzing the SERP for your target keywords is essential to understand what Google considers relevant and what type of content you need to create.
SERP Features
SERP features are all elements on a search results page beyond the standard organic results. Think of featured snippets, People Also Ask, image packs, video carousels, Local Packs, Knowledge Panels, and shopping results. SERP features take up increasing space on the results page, which can reduce organic traffic to individual websites. Optimize your content to appear in these features.
Sitemap
A sitemap is a file that lists all important URLs on your website so search engines can crawl your site efficiently. The most common form is an XML sitemap submitted through Google Search Console. There is also an HTML sitemap for visitors. A good sitemap contains only indexable pages, shows the last-modified date, and is automatically updated when you add or remove content.
Site Architecture
Site architecture is the way your website is organized: the hierarchy of pages, categories, and the relationships between them. A logical, flat structure where every page is reachable within 3 clicks helps search engines crawl your site efficiently and distribute link equity evenly. Think in silos: group related content under overarching categories. See also: information architecture.
SSL Certificate
An SSL certificate (Secure Sockets Layer) encrypts the connection between a web browser and a web server, recognizable by the padlock icon and HTTPS in the address bar. Google confirmed HTTPS as a ranking factor in 2014. Websites without SSL are marked as "Not Secure" in Chrome, which damages visitor trust. An SSL certificate is now available for free via Let's Encrypt and is an absolute basic requirement for any website, regardless of size.
Structured Data
See Schema Markup.
T
Technical SEO
Technical SEO encompasses all technical optimizations that ensure search engines can efficiently crawl, index, and understand your website. It involves aspects like page speed, mobile-friendliness, crawlability, HTTPS, XML sitemaps, canonicals, and structured data. Without a solid technical foundation, even the best content and backlinks cannot perform optimally.
Thin Content
Thin content refers to pages with little to no unique value for the visitor. Think of automatically generated pages, pages with just a few sentences, doorway pages, or copied content. Google's Panda update (2011) and the Helpful Content Update specifically target penalizing thin content. Every page on your website should serve a clear purpose and provide unique value.
Title Tag
The title tag (page title) is the HTML element that defines the title of your page. It appears as the clickable blue link in search results and in your browser tab. The title tag is one of the most important on-page SEO factors. Keep it under 60 characters, place your primary keyword preferably at the beginning, and make it compelling enough to click on. Every page should have a unique title tag.
Topical Authority
Topical authority is the extent to which Google considers your website an expert on a specific subject. You build topical authority by publishing extensively and in-depth on all facets of a topic, with a clear internal link structure. The more quality content you have on a theme, the easier new pages on that theme will rank. It is an increasingly important factor in modern SEO.
U
URL Structure
URL structure is the composition of your web address. An SEO-friendly URL is short, descriptive, contains relevant keywords, and reflects your website's hierarchy. Use hyphens as word separators (not underscores), avoid parameters and session IDs, and keep the URL as short as possible. Example: /en/glossary/seo-glossary is better than /page?id=123&cat=7.
User Experience (UX)
User experience is the overall experience a visitor has when using your website — from navigation and loading speed to readability and mobile convenience. Google measures UX signals via Core Web Vitals, bounce rate, and dwell time. A positive user experience leads to longer visits, more interaction, and ultimately better rankings. SEO and UX go hand in hand.
User Intent (Search Intent)
User intent (search intent) is the goal a searcher has when entering a search query. Google distinguishes four types: informational (learning something), navigational (finding a specific website), commercial (comparing options), and transactional (buying/doing something). Your content must match the search intent of your target keyword, or you will not rank — regardless of how well your page is technically optimized.
UGC (User Generated Content)
UGC is content created by users of your website, such as reviews, forum posts, comments, and community messages. Google values UGC when it is unique and valuable, but may consider it thin content if it is low quality. Use the attribute rel="ugc" on links in user-generated content so Google knows you do not vouch for the reliability of those links.
V
Voice Search
Voice search refers to searching via speech using assistants like Google Assistant, Siri, or Alexa. Voice search queries are typically longer, more conversational, and more often phrased as questions than typed searches. Optimize for it by adding FAQ sections, writing in natural spoken language, and targeting featured snippets — many voice assistants read the featured snippet aloud as the answer.
Visual Search
Visual search is searching with an image instead of text, for example via Google Lens. Users can take a photo of a product to find where they can buy it. Optimize for visual search by using high-quality images, adding descriptive alt text, using relevant file names, and implementing schema markup for products.
W
White Hat SEO
White hat SEO refers to techniques that are fully in line with Google's guidelines. It revolves around creating valuable content, building natural backlinks, providing a great user experience, and technically optimizing your website. White hat SEO delivers sustainable results without risk of penalties. It takes more time than black hat tactics, but the results are stable and future-proof. A modern AI marketing agency combines white hat SEO with smart automation.
Word Count
Word count is the total number of words on a page. Google has repeatedly stated there is no ideal word count — the length should be appropriate for the topic and search intent. In practice, comprehensive articles (1,500-3,000 words) often rank better for competitive keywords, simply because they cover the topic thoroughly. Quality and completeness matter more than a specific word count.
X
X-Robots-Tag
The X-Robots-Tag is an HTTP header that can give the same instructions as a meta robots tag, but at the server level. The advantage is that you can apply X-Robots-Tag to non-HTML files like PDFs, images, and videos that do not have meta tags in their HTML. Use it to prevent Google from indexing specific file types, such as internal documents or large media files that waste your crawl budget.
XML Sitemap
An XML sitemap is a structured file in XML format that lists all important URLs on your website, including metadata such as last-modified date and priority. Submit your XML sitemap through Google Search Console so Google can efficiently discover all your pages. Limit a sitemap to a maximum of 50,000 URLs or 50MB. Use sitemap indexes for larger websites and keep your sitemap automatically updated.
Z
Zero-click Search
A zero-click search is a search query where the user finds the answer directly in the SERP and does not click through to a website. Google answers an increasing number of search queries via featured snippets, Knowledge Panels, and direct answers. Research shows that more than 50% of all Google searches are zero-click. For SEO, this means: optimize for visibility in the SERP (branding) and focus on keywords with high click intent.
Search Volume
Search volume is the estimated average number of monthly searches for a specific keyword. It is measured using tools like Google's Keyword Planner, Ahrefs, or SEMrush. Higher search volume means more potential traffic, but also more competition. In keyword research, you weigh search volume against keyword difficulty and relevance to your business to select the most promising keywords.
Search Intent
See User Intent.