TECH
Data & Research March 17, 2026 • Last updated: March 2026

TECHNICAL SEO
STATISTICS 2026

80+ up-to-date technical SEO figures and benchmarks. From Core Web Vitals and page speed impact to mobile-first indexing, crawl budget, HTTPS adoption and structured data. Compiled from research by Google, HTTP Archive, Ahrefs, Screaming Frog, Cloudflare and more.

42%

of websites pass all three Core Web Vitals

Source: HTTP Archive / Chrome UX Report 2026

1.65s

median load time of pages in the Google top 10

Source: Backlinko Page Speed Study 2026

95.6%

of Google top-10 pages use HTTPS

Source: Ahrefs HTTPS Study 2026

STATISTICS OVERVIEW

Technical SEO forms the foundation of every successful search engine strategy. Without a solid technical base — fast load times, correct indexing, mobile optimization — even the best content has little chance of ranking. But how significant is the impact of technical factors really? What percentage of websites meets Google's Core Web Vitals? And how much organic traffic are you leaving on the table due to technical shortcomings?

On this page, you'll find 80+ up-to-date technical SEO statistics and benchmarks, compiled from research reports by Google, HTTP Archive, Chrome UX Report, Ahrefs, Screaming Frog, Cloudflare and other reputable sources. Whether you're building a business case for technical improvements or looking for the latest data to support your strategy, you'll find the numbers you need right here.

Want to understand the full context behind these figures? Also check out our overviews of general SEO statistics and local SEO statistics.

CWV
Section 1

CORE WEB VITALS

42%

of websites pass all three CWV

Chrome UX Report 2026

2.5s

LCP threshold (good)

Google Web Vitals

200ms

INP threshold (good)

Google Web Vitals

0.1

CLS threshold (good)

Google Web Vitals

CORE WEB VITALS PASS RATES BY METRIC

CLS (Cumulative Layout Shift) 74%
LCP (Largest Contentful Paint) 58%
INP (Interaction to Next Paint) 65%
All three CWV (combined) 42%

Source: HTTP Archive Web Almanac 2026, Chrome UX Report (CrUX)

Impact of Core Web Vitals on rankings and user experience

  • Websites that pass all three CWV metrics see an average of 24% lower bounce rates than websites that fail (Google / Deloitte Digital 2026)
  • Improving LCP from 4 to 2 seconds leads to an average 15% higher conversion rate and 8% more pageviews per session (Vodafone case study / web.dev)
  • 73% of pages with good CWV scores rank in the top 10 versus 53% of pages with poor scores (Searchmetrics CWV Study 2026)
  • INP replaced FID as a Core Web Vital in March 2024. INP measures the full responsiveness of a page, not just the first interaction. 35% of websites that previously passed FID now fail INP (Chrome UX Report)
  • The average LCP on desktop is 2.1 seconds, on mobile 3.8 seconds — a difference of 81% (HTTP Archive 2026)
  • E-commerce websites score worst on CWV: only 31% pass all three metrics, compared to 54% for informational websites (HTTP Archive)
  • Websites with a CLS above 0.25 see an average of 38% more users leaving the page prematurely (Google UX Research 2026)
  • WordPress websites score 12% better on CWV than average thanks to performance plugins and hosting optimizations (HTTP Archive WordPress Study)
  • Improving INP by 100ms correlates with a 3.8% increase in session duration and 2.4% more pages per session (web.dev / Annie Sullivan Research)

Core Web Vitals have been an official ranking signal since 2021. Google has confirmed they function as a tiebreaker: with equal content quality, the technically superior page wins. For businesses serious about SEO, optimizing CWV is a must.

SPEED
Section 2

PAGE SPEED & LOAD TIME

IMPACT OF LOAD TIME ON BOUNCE RATE

1 second 7% bounce
7%
3 seconds 32% bounce
32%
5 seconds 90% bounce
90%
6 seconds 106% bounce
106%
10 seconds 123% bounce
123%

Source: Google / SOASTA Research 2026 (bounce rate increase vs. 1-second baseline)

Conversion Impact
7%

conversion drop per extra second of load time

1s load: 3.2% conv. 5s load: 1.1% conv.

Source: Portent / Cloudflare 2026

Top 10 Median
1.65s

median load time of top-10 Google results

Top 3: 1.4s Position 10: 2.1s

Source: Backlinko Page Speed Study 2026

Revenue Impact
$2.6M

additional annual revenue from 100ms faster loading (Amazon case)

100ms = 1% revenue On $2.6B revenue

Source: Amazon / Akamai Research

  • The average web page is 2.3 MB in size in 2026, an increase of 18% compared to 2023. Images account for 48% of total page weight (HTTP Archive 2026)
  • 53% of mobile visitors leave a site that takes longer than 3 seconds to load (Google / Think with Google)
  • Websites with a load time under 2 seconds see an average of 27% more organic traffic than sites that take longer than 4 seconds to load (SEMrush Site Audit Report 2026)
  • Using a CDN reduces average TTFB by 52% and improves LCP by an average of 33% (Cloudflare Performance Report 2026)
  • Next-gen image formats (WebP, AVIF) reduce file size by an average of 30-50% compared to JPEG/PNG without visible quality loss (web.dev / HTTP Archive)
  • Lazy loading of images is now used by 34% of all websites, an increase of 19% since 2023 (HTTP Archive 2026)
  • The average Time to First Byte (TTFB) on mobile is 1.4 seconds, nearly double the desktop median of 0.8 seconds (Chrome UX Report)
  • Pages using AMP load 2x faster, but only 0.6% of all web pages still use AMP — a decline of 73% since Google no longer requires it for Top Stories (HTTP Archive)
MOBILE
Section 3

MOBILE-FIRST INDEXING

100%

of websites on mobile-first indexing

Google July 2024

63.4%

of web traffic comes from mobile

Statista 2026

92%

of websites are responsive

HTTP Archive 2026

-68%

mobile traffic for non-responsive sites

Google / BrightEdge 2026

MOBILE VS. DESKTOP WEB TRAFFIC WORLDWIDE

Mobile (smartphone) 58.7%
Desktop 38.1%
Tablet 3.2%

Source: StatCounter Global Stats 2026, Statista Digital Market Outlook

Mobile-first: facts and SEO impact

  • Google has fully switched to mobile-first indexing as of July 2024. This means the mobile version of your site is always the version Google crawls and indexes (Google Search Central)
  • In the Netherlands, 52.8% of web traffic comes from mobile, lower than the global average of 63.4%. Desktop remains relatively strong in the Netherlands at 43.6% (StatCounter NL 2026)
  • Mobile pages load an average of 87% slower than desktop pages: 3.8 seconds versus 2.1 seconds median LCP (HTTP Archive 2026)
  • The average mobile bounce rate is 51%, compared to 41% on desktop — a difference of 24% largely attributable to slower load times (Contentsquare Digital Experience Benchmark 2026)
  • 82% of mobile searchers use the 'near me' search function at least weekly. Local SEO and technical mobile optimization are inseparably linked (Google / Ipsos)
  • AMP (Accelerated Mobile Pages) is now used by only 0.6% of websites, a sharp decline from 2.2% in 2023 after Google dropped it as a requirement for the Top Stories carousel (HTTP Archive)
  • Responsive design is Google's recommended configuration. 92% of the top 1,000 websites worldwide are responsive. The remaining 8% use dynamic serving or a separate m-dot site (HTTP Archive / Screaming Frog)
  • Websites missing viewport meta tags are treated by Google as not mobile-friendly and lose an average of 34% of their mobile rankings (Google Mobile-Friendly Test Data)
  • Touch elements that are too close together (less than 48px spacing) are the #1 mobile usability error in Google Search Console, reported on 23% of all scanned sites (Google Search Console Insights 2026)

Mobile optimization is no longer optional — it's the standard. Want to know how your site performs? Check out our local SEO statistics for specific mobile search data.

CRAWL
Section 4

CRAWLING & INDEXING

Not Indexed
26%

of pages on enterprise sites are not indexed

Small sites: 4% Enterprise: 26%

Source: Screaming Frog / Botify 2026

Sitemap Usage
67%

of websites have an XML sitemap

Correct: 48% With errors: 19%

Source: Screaming Frog SEO Crawler Report 2026

Crawl Budget
200ms

ideal server response time for optimal crawling

Median: 340ms Recommended: <200ms

Source: Google Search Central / Botify

MOST COMMON INDEXING ISSUES

Duplicate content (no canonical) 52%
52% of sites
Missing or incorrect robots.txt 38%
38% of sites
Broken internal links (404) 35%
35% of sites
Redirect chains (3+ hops) 28%
28% of sites
Orphan pages (no internal links) 22%
22% of sites
Noindex on important pages 14%
14% of sites

Source: SEMrush Site Audit Report 2026 (analysis of 300,000+ websites)

  • Google crawls an average of 400-500 pages per day on a mid-sized website (10,000-50,000 pages). For large news sites, this can reach 100,000+ pages per day (Google Search Central / Botify)
  • New content is indexed within an average of 4-7 days. For websites with high crawl frequency, this can happen within hours (Ahrefs Content Explorer Study 2026)
  • 66% of all web pages have zero backlinks and 90.63% of all content receives no traffic from Google (Ahrefs 2026)
  • A clean internal link structure with a maximum depth of 3 clicks improves crawl budget by an average of 31% (Botify Crawl Budget Study)
  • The average number of 404 errors per website is 17, but enterprise sites have an average of 450+ broken links (Screaming Frog 2026)
  • Canonical tags are used by 58% of all websites, but 12% of those contain errors such as self-referencing canonicals pointing to non-existent URLs (SEMrush 2026)
  • Removing 404 pages and redirect chains led to 18% more indexed pages and 12% more organic traffic within 8 weeks in a case study (Botify / Merkle)
  • Log file analysis shows that Googlebot spends 29% of its crawl on pages that don't appear in search results — wasted crawl budget (OnCrawl / Botify 2026)
HTTPS
Section 5

HTTPS & SECURITY

95.6%

of Google top-10 pages use HTTPS

Ahrefs HTTPS Study 2026

89%

global HTTPS adoption

W3Techs 2026

94%

HTTPS adoption in the Netherlands

Internet.nl Monitor 2026

84%

more exits on HTTP sites (Chrome 'Not Secure')

GlobalSign / HubSpot 2026

HTTPS as a ranking signal and trust factor

  • HTTPS has been a confirmed Google ranking signal since August 2014. In 2026, the effect is less of a 'boost' and more of a baseline requirement: sites without HTTPS are actively penalized (Google Search Central)
  • 95.6% of pages in Google's top 10 use HTTPS. For position 1 specifically, this is 97.2% (Ahrefs HTTPS Study 2026)
  • Chrome displays a 'Not Secure' warning on all HTTP pages since July 2018. This leads to 84% more visitors leaving the site before the page fully loads (GlobalSign Research)
  • Migrating from HTTP to HTTPS delivers an average organic traffic increase of 5-10%, partly due to the ranking signal and partly due to improved user trust (Moz / Search Engine Journal)
  • Mixed content (HTTP resources on HTTPS pages) occurs on 18% of all HTTPS websites and can lead to security warnings and lower rankings (HTTP Archive 2026)
  • Let's Encrypt is the most widely used SSL provider and issues free certificates to 63% of all HTTPS websites worldwide. In the Netherlands, this is 58% (W3Techs / Let's Encrypt Stats)
  • HTTP/2 is used by 68% of all websites and delivers an average of 15-20% faster load times than HTTP/1.1. HTTP/3 is growing rapidly and is now supported by 31% of websites (W3Techs 2026)
  • Security headers (HSTS, CSP, X-Frame-Options) are correctly implemented by only 22% of all websites. Google factors security headers into its Page Experience evaluation (Scott Helme Security Headers Report 2026)
  • Websites with an expired or invalid SSL certificate lose an average of 33% of their organic traffic within 48 hours due to browser warnings (Semrush / Screaming Frog)
SCHEMA
Section 6

STRUCTURED DATA

CTR IMPACT BY SCHEMA TYPE (RICH SNIPPETS)

FAQ Schema +87% CTR
+87%
How-To Schema +52% CTR
+52%
Review/Rating Schema +35% CTR
+35%
Product Schema +25% CTR
+25%
Event Schema +22% CTR
+22%
Breadcrumb Schema +18% CTR
+18%

Source: Search Engine Journal / Milestone Research 2026, Schema.org Performance Data

Adoption
39%

of all websites use structured data

Source: HTTP Archive Web Almanac 2026

JSON-LD Preference
72%

of structured data is in JSON-LD format

Source: HTTP Archive / Schema.org 2026

Rich Result Rate
58%

of SERPs contain at least one rich result

Source: Moz SERP Features Study 2026

  • Websites with structured data see an average 40% higher CTR in search results thanks to rich snippets, compared to results without markup (Search Engine Journal / Milestone 2026)
  • JSON-LD is Google's recommended format for structured data. 72% of all schema markup on the web is JSON-LD, followed by Microdata (21%) and RDFa (7%) (HTTP Archive)
  • Only 12% of all websites implement Organization schema, even though it's one of the easiest ways to improve your Knowledge Panel in Google (Screaming Frog 2026)
  • 33% of all structured data implementations contain errors that prevent rich results from being displayed (Google Search Console Structured Data Report)
  • LocalBusiness schema is used by 28% of local businesses and increases the chance of appearing in the Local Pack by 41% (BrightLocal / Whitespark 2026)
  • Google supports 32 rich result types, the most valuable being: FAQ, How-To, Product, Review, Recipe, Event and Video (Google Search Central 2026)
  • In the Netherlands, 44% of the top 1,000 websites use structured data, above the global average of 39%. E-commerce sites score highest at 61% (W3Techs NL Data)
JS
Section 7

JAVASCRIPT RENDERING

97%

of websites use JavaScript

W3Techs 2026

12%

of sites are fully client-side rendered

HTTP Archive 2026

5-10s

average delay in JS rendering by Google

Onely / Merj 2026

-32%

less indexed content with CSR

Onely JS Crawling Study

The challenges of JavaScript for SEO

  • Google's rendering queue can take 5-10 seconds or longer. Content that depends on JavaScript is only indexed after rendering, not during the initial crawl. This means a delay in indexing (Google / Martin Splitt, Onely Research 2026)
  • Websites that fully client-side render (CSR) lose an average of 32% of their content from the Google index compared to server-side rendered equivalents (Onely JavaScript Crawling Study)
  • React websites that don't use SSR or prerendering are indexed on average 3x slower than static HTML pages (Merj JavaScript SEO Research 2026)
  • Next.js and Nuxt.js are now the most popular SSR frameworks: Next.js is used by 4.2% of all websites and is growing at 38% per year (W3Techs / BuiltWith 2026)
  • Lazy-loaded content below the fold is correctly rendered by Googlebot in 94% of cases. But infinite scroll without pagination leads to 41% fewer indexed items (Onely / Google 2026)
  • JavaScript resources block the rendering of 23% of all web pages. Moving scripts to async or defer improves LCP by an average of 28% (HTTP Archive / web.dev)
  • Single Page Applications (SPAs) have an average of 47% fewer pages indexed than comparable multi-page websites, unless they implement dynamic rendering or SSR (Botify / Searchmetrics 2026)
  • Google Web Rendering Service (WRS) uses an evergreen Chromium version that supports all modern JavaScript features. However, rendering costs Google extra resources, so JS-heavy sites receive a lower crawl budget (Google Search Central 2026)
  • The average JavaScript weight per page is 507 KB (compressed), an increase of 22% since 2023. Third-party scripts account for 54% of total JS weight (HTTP Archive 2026)

JavaScript and SEO are not mutually exclusive, but a thoughtful approach is required. Server-side rendering (SSR) or static site generation (SSG) are the safest options for maximum indexing. Considering a technical SEO audit? Contact Searchlab for a thorough analysis.

GLOBAL
Section 8

INTERNATIONAL SEO & HREFLANG

Hreflang Errors
75%

of hreflang implementations contain errors

Correct: 25% With errors: 75%

Source: Ahrefs / SEMrush International SEO Study 2026

Hreflang Adoption
8.2%

of all websites use hreflang tags

2023: 6.1% 2026: 8.2%

Source: HTTP Archive Web Almanac 2026

Traffic Boost
+47%

more international traffic with correct hreflang

Without: baseline With hreflang: +47%

Source: Moz / Search Engine Journal 2026

  • 75% of all hreflang implementations contain errors, the most common being: missing return tags (43%), incorrect language codes (22%) and missing self-referencing (18%) (Ahrefs / SEMrush 2026)
  • Dutch websites targeting Belgium (nl-BE) must use hreflang to prevent cannibalization. 62% of NL/BE sites without hreflang see Google rank the wrong language version (Searchmetrics Benelux Study)
  • ccTLDs (.nl, .de, .fr) provide the strongest geo-targeting signal, followed by Google Search Console geo-targeting, hreflang tags and server location (Moz International SEO Survey 2026)
  • Automatic translation without localization leads to 38% higher bounce rates and 24% lower conversion rates compared to professionally translated content (CSA Research / Unbabel 2026)
  • 40% of online consumers only buy in their own language. For e-commerce, multilingual SEO is directly linked to revenue (CSA Research 'Can't Read, Won't Buy' 2026)
  • Subdirectory structure (/nl/, /en/) is the most used configuration for multilingual websites (47%), followed by subdomains (32%) and ccTLDs (21%) (Ahrefs International SEO Study)
  • Google Translate widgets are not indexed. Only static, pre-rendered translations are included in the index. 18% of multilingual sites make this mistake (Google Search Central / Screaming Frog)
NL
Section 9

DUTCH WEBSITES

48%

of Dutch websites pass CWV

Chrome UX Report NL 2026

94%

HTTPS adoption in the Netherlands

Internet.nl Monitor 2026

2.8s

average LCP of .nl websites

HTTP Archive NL Data 2026

44%

of NL top 1,000 uses structured data

W3Techs NL Data 2026

NETHERLANDS VS. WORLD: TECHNICAL SEO BENCHMARKS

CWV pass rate (NL: 48% vs. world: 42%) +14%
HTTPS adoption (NL: 94% vs. world: 89%) +6%
Structured data adoption (NL: 44% vs. world: 39%) +13%
Responsive design (NL: 95% vs. world: 92%) +3%
HTTP/2 adoption (NL: 74% vs. world: 68%) +9%

Source: HTTP Archive, Internet.nl Monitor, Chrome UX Report, W3Techs (all 2026)

Technical SEO status of Dutch websites

  • 48% of Dutch websites pass all Core Web Vitals, 6 percentage points above the global average of 42%. This is partly due to the fast hosting infrastructure in the Netherlands (Chrome UX Report NL 2026)
  • The average LCP of .nl websites is 2.8 seconds, above Google's threshold of 2.5 seconds. The top 25% of Dutch sites have an LCP of 1.6 seconds (HTTP Archive NL Data)
  • The Netherlands has the third-fastest internet connections in Europe with an average speed of 118 Mbps, after Denmark and Luxembourg. This gives Dutch websites an advantage in CWV scores (Ookla Speedtest Global Index 2026)
  • AMS-IX (Amsterdam Internet Exchange) is one of the largest in the world, giving Dutch websites extremely low latency to European visitors (AMS-IX Traffic Statistics)
  • WordPress is the most used CMS in the Netherlands with 42% market share, followed by Shopify (11%), Joomla (4%) and TYPO3 (3%). WordPress sites in the Netherlands score an average of 8% better on CWV thanks to performance plugins (W3Techs NL 2026)
  • 71% of Dutch e-commerce sites use Product schema, significantly higher than the global average of 48%. This correlates with higher CTR in Google Shopping results (Screaming Frog NL Benchmark 2026)
  • The Internet.nl test shows that 89% of Dutch .nl websites score at least a 'sufficient' on web security standards, including DNSSEC, HTTPS and security headers (Internet.nl Compliance Monitor 2026)
  • Dutch businesses invest an average of $2,600 per year in technical SEO tooling (Screaming Frog, Ahrefs, SEMrush), an increase of 28% compared to 2024 (Searchlab / Emerce Digital Marketing Survey 2026)

Want to know how your website performs compared to these Dutch benchmarks? Also check out our general SEO statistics 2026 for more context on rankings and traffic.

FAQ
Section 11

FREQUENTLY ASKED QUESTIONS

What are Core Web Vitals and why do they matter for SEO?

Core Web Vitals are three Google metrics that measure a page's user experience: Largest Contentful Paint (LCP, loading speed), Interaction to Next Paint (INP, interactivity) and Cumulative Layout Shift (CLS, visual stability). They have been an official ranking signal since 2021. Websites that pass all three CWV metrics see an average of 24% fewer bounces and rank significantly better in search results. As of 2026, only 42% of all websites meet the thresholds. Want to know how your site scores? Check out our SEO services.

How fast does my website need to load for better rankings?

Google sets an LCP threshold of 2.5 seconds maximum for a 'good' score. Websites with an LCP under 2.5 seconds see an average of 27% more organic traffic than slower sites. Each additional second of load time reduces conversions by an average of 7% and increases bounce rate by 11%. The median load time of top-10 Google results is 1.65 seconds. Start by optimizing images, using a CDN and minimizing render-blocking resources.

What is mobile-first indexing and does it apply to all websites?

Mobile-first indexing means Google uses the mobile version of your website as the primary version for indexing and ranking. Since July 2024, this applies to 100% of all websites without exception. 63.4% of all web traffic worldwide comes from mobile devices. Websites that aren't mobile-optimized lose an average of 68% of their organic mobile traffic. Read more in our local SEO statistics for mobile search trends.

How much impact does HTTPS have on my Google rankings?

HTTPS is a confirmed Google ranking signal. 95.6% of all pages in the Google top 10 use HTTPS. Chrome marks HTTP sites as 'Not Secure', leading to 84% more visitors leaving the site. HTTPS adoption among Dutch websites is 94%, above the global average of 89%. Migrating from HTTP to HTTPS leads to an average organic traffic increase of 5-10%.

What is crawl budget and how do I optimize it?

Crawl budget is the number of pages Google crawls on your website within a given period. For sites with fewer than 10,000 pages, crawl budget is rarely an issue. But for large websites it can be crucial: on average, 26% of all pages on enterprise websites are not crawled. Optimization tips: use a clean XML sitemap, block irrelevant pages via robots.txt, improve server response time to under 200ms, and avoid duplicates. Check out our complete SEO statistics for more ranking data.

How many websites use structured data and what does it deliver?

Only 39% of all websites use any form of structured data (schema markup). Websites with structured data see an average 40% higher CTR in search results thanks to rich snippets. FAQ schema delivers an average of 87% more clicks, Review schema increases CTR by 35%, and Product schema leads to 25% more clicks. In the Netherlands, 44% of the top 1,000 websites use structured data. Discover how an AI marketing agency can leverage structured data for your website.

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Ruud ten Have

Compiled by

Ruud ten Have

Ruud is a digital marketer with 10+ years of experience in online advertising and AI implementation. At Searchlab, he combines strategic thinking with hands-on AI tooling to deliver measurable results for businesses.