A
Abandoned Cart
An abandoned cart occurs when a visitor adds products to their shopping cart but leaves without completing the purchase. On average, 70% of shoppers abandon their carts. Common causes include unexpected shipping costs, a lengthy checkout process, or mandatory account registration. Abandoned cart emails — sent within 1 hour — recover an average of 5-10% of lost revenue.
Add-to-Cart Rate
The add-to-cart rate measures the percentage of visitors who add at least one product to their cart. A healthy rate falls between 5-15%, depending on the industry. A low rate points to problems with your product pages: unclear pricing, poor photography, or missing information. Optimizing product pages alongside targeted ad campaigns improves both traffic quality and add-to-cart rate.
Affiliate Marketing
Affiliate marketing is a revenue model where external partners (affiliates) promote your products in exchange for a commission per sale or lead. The affiliate places a tracking link on their website, blog, or social media channel. When a successful transaction occurs, the affiliate receives a percentage of the revenue — typically 5-20%. Popular affiliate networks include CJ Affiliate, ShareASale, and Awin. The advantage: you only pay for results.
AOV (Average Order Value)
AOV stands for Average Order Value — the average amount spent per order. You calculate it by dividing total revenue by the number of orders. A higher AOV means more revenue without acquiring additional customers. Boost your AOV with cross-selling, upselling, bundle deals, or free shipping above a minimum threshold. A store with a $75 AOV and 1,000 monthly orders that increases AOV by 10% earns an extra $7,500 per month.
API (Application Programming Interface)
An API is a technical interface that allows two software systems to communicate with each other. In e-commerce, APIs are essential for integrations: your store connects via APIs to your payment provider, inventory system, accounting software, and shipping carrier. Platforms like Shopify and WooCommerce offer extensive APIs that let developers add functionality. REST APIs and GraphQL are the most widely used standards.
ARPU (Average Revenue Per User)
ARPU measures the average revenue per unique customer over a given period. Unlike AOV (per order), ARPU looks at total customer value across, say, a month or quarter. ARPU is particularly relevant for subscription models and stores with repeat customers. A rising ARPU indicates higher customer loyalty, more effective cross-selling, or successful upgrades to premium products.
B
B2B E-commerce
B2B e-commerce is online trade between businesses — from manufacturer to wholesaler, from wholesaler to retailer. B2B stores differ from B2C through customer-specific pricing, volume discounts, quote requests, larger order quantities, and ERP system integrations. The global B2B e-commerce market is five times larger than B2C. Platforms like Shopify Plus, BigCommerce, and Intershop are popular choices for B2B environments.
B2C E-commerce
B2C e-commerce is the most recognizable form of online selling: a business sells directly to consumers. Think Amazon, Target, or Zalando. B2C stores focus on user experience, fast checkout, reviews, and visual product presentation. The average conversion rate in B2C e-commerce sits between 1.5-3%. A well-designed landing page can significantly increase this percentage.
Backorder
A backorder is an order for a product that is temporarily out of stock but will be shipped once it becomes available again. Offering backorders prevents you from losing revenue when popular products sell out. The risk: long delivery times can lead to cancellations and negative reviews. Always clearly communicate the expected delivery date and proactively send status updates to the customer.
BNPL (Buy Now, Pay Later)
BNPL is a payment option that lets customers receive their purchase and pay later — often in interest-free installments. Klarna, Afterpay, and Affirm are popular BNPL providers. BNPL increases conversion rates by an average of 20-30% and average order value by 15-40%. The risk for the retailer is minimal: the BNPL provider assumes the payment risk.
Bounce Rate
The bounce rate is the percentage of visitors who leave your store without viewing a second page or performing an interaction. A high bounce rate (above 60%) on product pages signals that visitors are not finding what they are looking for. Causes include slow load times, misleading ads, poor mobile experience, or irrelevant content. Reduce your bounce rate by ensuring your ads closely match your landing page.
Bundling
Bundling is combining multiple products into a package at a more attractive price than the individual items combined. For example, a smartphone store might bundle a phone with a case and screen protector. Bundling increases average order value, helps clear slow-moving inventory, and offers customers perceived value. Pure bundling (only available as a package) versus mixed bundling (also sold individually) are the two main strategies.
C
Cart Abandonment
Cart abandonment is the percentage of visitors who add products to their cart but do not complete the purchase. The global average hovers around 70%. The top three causes are unexpected costs (shipping, taxes), mandatory account creation, and an overly long checkout process. Effective solutions include transparent pricing, guest checkout, progress indicators, exit-intent popups, and automated abandoned cart emails.
Checkout
The checkout is the payment process in your online store — from cart to confirmed order. An optimized checkout is crucial: every additional step reduces conversion by 7-10%. Best practices include a one-page checkout, a guest checkout option, auto-filled address fields, multiple payment methods, and clear trust signals such as security badges and SSL indicators. Show shipping costs as early as possible.
Churn Rate
The churn rate measures the percentage of customers who stop buying within a given period. For subscription stores, this is the cancellation rate. A monthly churn of 5% may seem low, but it means you lose 46% of your customer base annually. Reduce churn through excellent customer service, personalized offers, loyalty programs, and proactive outreach when signals of disengagement appear.
Conversion Rate
The conversion rate is the percentage of visitors who complete a desired action — in e-commerce, typically a purchase. Calculate it by dividing the number of transactions by the number of sessions, multiplied by 100. The average e-commerce conversion rate falls between 1.5-3%. Top-performing stores achieve 5% or higher. Factors like traffic quality, user experience, and product selection determine your rate.
CPA (Cost Per Acquisition)
CPA is the average cost to acquire a new customer. Calculate it by dividing your total marketing spend by the number of new customers gained. A store that spends $5,000 on Google Ads and acquires 100 new customers has a CPA of $50. Your CPA should always be lower than your Customer Lifetime Value. Optimize CPA by continuously refining campaigns and aligning bid strategies with profit margins per product category.
Cross-selling
Cross-selling is recommending related or complementary products alongside a purchase. "Customers who bought this also bought..." is the most well-known example. Amazon reportedly generates 35% of its revenue through cross-selling. Effective placements include the product page, shopping cart, and order confirmation email. The key is relevance — only suggest products that logically complement the original purchase. See also upselling.
CLV / Customer Lifetime Value
Customer Lifetime Value (CLV or CLTV) is the total revenue a customer is expected to generate over the entire relationship. The basic formula: average order value x purchase frequency x average customer lifespan. A customer with a $60 AOV who buys 4 times per year and remains a customer for 3 years has a CLV of $720. CLV determines how much you can invest in acquisition and helps prioritize retention over acquisition.
D
D2C (Direct-to-Consumer)
D2C is a business model where brands sell directly to consumers, cutting out retailers and wholesalers. Warby Parker, Allbirds, and HelloFresh are well-known D2C examples. Advantages include higher margins, direct customer relationships, control over brand experience, and first-party data ownership. D2C brands invest heavily in digital marketing, social media, and their own online stores to reach their target audience.
Digital Product
A digital product is a product delivered electronically: e-books, online courses, software, music, templates, or digital art. The major advantage over physical products: no inventory, no shipping costs, no fulfillment, and unlimited scalability. Margins often exceed 80%. Popular platforms for digital products include Gumroad, Teachable, Kajabi, and Shopify's digital download feature.
Dropshipping
Dropshipping is an e-commerce model where you sell products without holding any inventory. When a customer orders, you purchase the item from a supplier who ships it directly to the customer. The barrier to entry is low: you need no warehouse, no inventory investment, and minimal financial risk. Downsides include lower margins (10-30%), longer delivery times (especially from Asia), limited quality control, and intense competition.
Dynamic Pricing
Dynamic pricing is the automatic adjustment of product prices based on supply and demand, competitor prices, time of day, or customer segment. Airlines and hotels have used it for decades; in e-commerce it is becoming increasingly common. Tools like Prisync, Omnia Retail, and Competera monitor competitor prices and adjust yours automatically. Important: be transparent and avoid price discrimination that erodes customer trust.
E
E-commerce Platform
An e-commerce platform is the software you use to build and manage your online store. Your choice determines scalability, costs, and capabilities. Popular platforms include Shopify (hosted, user-friendly), WooCommerce (open-source on WordPress), Magento (enterprise), Lightspeed (omnichannel), and BigCommerce. The right choice depends on your product count, technical expertise, budget, and growth ambitions.
EAN Code (European Article Number)
An EAN code is a unique barcode that identifies products worldwide — the most common is EAN-13 with 13 digits. In e-commerce, an EAN code is essential for selling on marketplaces like Amazon, for product feeds to Google Shopping, and for inventory management. EAN codes are purchased through GS1. Without an EAN code, you cannot sell on most platforms and miss out on visibility on comparison sites.
Email Marketing (E-commerce)
Email marketing is one of the highest-ROI channels for e-commerce: an average return of $36 for every dollar invested. Essential flows include welcome sequences, abandoned cart emails, order confirmations, review requests, win-back campaigns, and personalized product recommendations. Tools like Klaviyo, Mailchimp, and ActiveCampaign integrate seamlessly with store platforms. Segmentation based on purchase behavior increases relevance and revenue per email.
F
Flash Sale
A flash sale is a time-limited promotion with steep discounts lasting a few hours to a maximum of 48 hours. The urgency and scarcity drive impulse purchases. Flash sales are effective for clearing seasonal inventory, generating traffic spikes, and re-engaging dormant customers. The risk: running them too frequently trains customers to always wait for a discount. Use them strategically, no more than 4-6 times per year.
Fraud Detection
Fraud detection encompasses all systems and processes that prevent fraud in your online store — from stolen credit cards to return fraud. E-commerce fraud costs the industry billions annually. Automated tools analyze patterns: unusual order frequencies, mismatches between shipping and billing addresses, or suspicious IP addresses. Payment providers like Stripe and Adyen offer built-in fraud prevention. 3D Secure verification adds an extra layer of security.
Fulfillment
Fulfillment covers the entire logistics process after an order is placed: picking, packing, labeling, shipping, and handling returns. You can handle fulfillment in-house, outsource it to a fulfillment center (3PL), or use marketplace fulfillment (Amazon FBA). The choice depends on your order volume, product type, and growth rate. Fast fulfillment (same-day or next-day) has become the standard expectation in most markets.
Funnel (Sales Funnel)
The funnel visualizes the customer journey from first visit to purchase as a funnel shape: awareness, consideration, conversion, and retention. Each stage has fewer people — hence the funnel metaphor. In e-commerce, you analyze the funnel to identify where visitors drop off. If 80% leave between viewing a product and adding it to the cart, the problem lies with your product pages.
G
Google Merchant Center
Google Merchant Center is the platform where you upload your product feed to display products in Google Shopping, Search, and other Google surfaces. You manage product data, prices, stock status, and shipping details here. A correct and complete feed is essential for strong Shopping campaign performance. Common mistakes include missing GTIN/EAN codes, price discrepancies with your website, and images with watermarks.
Google Shopping
Google Shopping displays products with an image, price, and store name directly in search results. It is one of the most effective channels for e-commerce: shoppers immediately see what a product costs and looks like, which means purchase intent is high. Google Shopping ads are managed through Google Ads based on your product feed. The average ROAS (Return on Ad Spend) for Shopping campaigns ranges from 400-800%.
Guest Checkout
Guest checkout allows customers to complete their purchase without creating an account. It removes one of the biggest barriers in the payment process: mandatory registration causes an estimated 24% of all cart abandonment. Best practice is to offer guest checkout by default and optionally let customers create an account after the purchase using the details they just entered. This way you maximize conversion while still collecting data.
H
Headless Commerce
Headless commerce is an architecture where the frontend (what the customer sees) is decoupled from the backend (products, orders, inventory). Both communicate via APIs. Advantages include maximum design freedom, faster load times, easier omnichannel publishing, and independent updates. Downsides: higher development costs and more complex maintenance. Headless is especially interesting for large stores that want to deliver unique customer experiences across multiple channels.
Hosting (Web Hosting)
Hosting is the server space where your online store runs. With hosted platforms (Shopify, Lightspeed), hosting is included — you do not have to worry about it. With self-hosted solutions (WooCommerce, Magento), you choose your own hosting provider. Hosting quality determines your load speed, uptime, and security. Every extra second of load time costs an average of 7% in conversions. Choose managed hosting with SSD storage and a server close to your customers.
I
iDEAL
iDEAL is the most popular online payment method in the Netherlands, with over 70% market share among Dutch online stores. Customers pay directly from their bank account through their trusted banking environment. Transactions are guaranteed: once the payment succeeds, the money is secured. iDEAL is available through all major payment service providers like Mollie and Adyen. Transaction fees are typically around $0.30 per payment.
Inventory
Inventory is the total stock of products available for sale. Good inventory management is crucial: too much stock ties up capital and risks write-offs, while too little leads to missed sales and disappointed customers. Modern stores use inventory management software that syncs in real time across all sales channels — online store, marketplace, and physical location. Popular tools include TradeGecko, Cin7, and Shopify's built-in feature.
Internationalization
Internationalization is the process of making your store suitable for selling in multiple countries. This encompasses translations, local payment methods, currency conversion, international shipping, tax compliance, and localized customer service. Common mistakes include only translating without offering local payment methods and charging the same shipping rates for all countries. Start with markets that share geographic proximity and high purchasing power with your home market.
K
Trust Badge (Quality Mark)
A trust badge — such as the Better Business Bureau seal, Trustpilot badge, or Norton Secured mark — increases consumer confidence in your online store. Certified stores meet strict requirements around delivery, payment, complaint handling, and privacy. Displaying recognized trust badges can increase conversion by 4-7% on average. Customers feel safer when they see third-party validation, especially on first-time purchases.
Klarna
Klarna is a Swedish fintech company offering buy now, pay later and installment payment options for online stores. With Klarna, customers can receive their order first and pay within 14-30 days, or split the payment into 3-4 installments. For the store, risk is minimal: Klarna guarantees the payment and assumes the default risk. Transaction fees are higher than standard card payments (around 3-4% plus a fixed fee), but the conversion and AOV increase often more than compensates.
KPI (Key Performance Indicator)
A KPI is a measurable performance indicator used to assess the success of your online store. The five most important e-commerce KPIs are: conversion rate, average order value, customer lifetime value, cart abandonment rate, and customer acquisition cost. Set a target per KPI and measure weekly. KPIs without context are meaningless — always compare against your own history, seasonal patterns, and industry benchmarks.
L
Last Mile Delivery
Last mile delivery is the final leg of the delivery process: from the distribution center to the customer's doorstep. This is the most expensive and complex part of the logistics chain — it can account for up to 53% of total shipping costs. Innovations like parcel lockers, same-day delivery, ultra-fast delivery, and electric delivery vehicles are working to make the last mile more efficient and sustainable.
Lightspeed
Lightspeed is an e-commerce and POS platform popular among retailers with both a physical store and an online shop. Lightspeed's strong suit is its seamless omnichannel integration: inventory, customer data, and orders sync in real time across all channels. Lightspeed offers built-in reporting, loyalty programs, and integrations with payment providers. Pricing starts around $69 per month for e-commerce.
Logistics
Logistics in e-commerce covers the entire chain from procurement to delivery: warehousing, inventory management, order picking, packaging, shipping, and return processing. Efficient logistics is a competitive advantage — customers expect next-day delivery as standard. Options include in-house logistics, third-party fulfillment (3PL), or marketplace logistics. The choice depends on your order volume, product type, and growth ambition. Automation through warehouse management systems reduces errors and costs.
Loyalty Program
A loyalty program rewards repeat customers with points, discounts, or exclusive perks. The goal: increase customer retention and maximize lifetime value. Loyalty program members spend an average of 12-18% more per year. Popular models include points systems (1 dollar = 1 point), tiered programs (bronze/silver/gold), and paid VIP programs. Tools like LoyaltyLion, Smile.io, and Yotpo integrate directly with your store platform.
M
Magento (Adobe Commerce)
Magento, part of Adobe since 2018 as "Adobe Commerce," is a powerful open-source e-commerce platform for mid-size to large online stores. Magento offers extensive functionality for complex catalogs, multi-store setups, B2B features, and internationalization. The learning curve is steep and you need experienced developers. Magento Open Source is free; Adobe Commerce starts at approximately $22,000 per year. Suited for stores with 10,000+ products.
Marketplace
A marketplace is an online platform where multiple sellers offer their products to a shared customer base. Amazon, eBay, Etsy, and Walmart Marketplace are prominent examples. Advantages include instant access to millions of buyers, built-in trust, and lower acquisition costs. Downsides: commissions (5-20%), less brand identity, price competition, and platform dependency. Most successful stores combine their own website with marketplace sales.
Mobile Commerce (M-commerce)
Mobile commerce is e-commerce via smartphones and tablets. More than 60% of all online store visits now happen on mobile, and the share of mobile transactions grows every year. A mobile-first approach is therefore essential: responsive design, large tap targets, simplified checkout, mobile payment options (Apple Pay, Google Pay), and fast load times. Stores that are not optimized for mobile systematically lose revenue to competitors that are.
Mollie
Mollie is a European payment service provider that makes online payments simple for stores. With a single integration you can offer iDEAL, credit card, PayPal, Klarna, Bancontact, Apple Pay, and more. Mollie charges no monthly fees — you pay only per transaction (starting at $0.30 for iDEAL). The API is developer-friendly and there are ready-made plugins for all major store platforms. Mollie processes over $10 billion in transactions annually.
Multichannel
Multichannel means selling through multiple channels — online store, marketplace, physical location, social media — but these channels operate independently of each other. Each channel has its own inventory, customer service, and customer data. The difference with omnichannel: in multichannel, channels work side by side; in omnichannel, they are fully integrated. Multichannel is a good starting point, but the step to omnichannel delivers a better customer experience and higher revenue.
N
Niche Store
A niche store focuses on a specific product category or audience — for example, sustainable baby clothing, artisanal coffee, or left-handed tools. The advantage of a niche: less competition, higher margins, more targeted marketing, and a more loyal customer base. The challenge is finding a niche large enough for a viable business but small enough not to be dominated by major players. Validate your niche with keyword research before you start.
NPS (Net Promoter Score)
The Net Promoter Score measures customer satisfaction with one question: "How likely are you to recommend us on a scale of 0-10?" Scores of 9-10 are promoters, 7-8 are passives, and 0-6 are detractors. NPS = % promoters minus % detractors. An NPS above 50 is excellent for e-commerce. Send the NPS question 7-14 days after delivery and use the responses to systematically improve your service. Reach out personally to detractors.
O
Omnichannel
Omnichannel is a strategy where all sales channels (online store, physical location, marketplace, app, social media) are fully integrated. The customer experiences a seamless whole: order online and return in-store, fill the cart on mobile and check out on desktop, or check online stock while in-store. The difference from multichannel is the complete integration of data, inventory, and customer experience. Omnichannel customers spend 15-30% more than single-channel customers.
Order Management System (OMS)
An order management system centralizes and automates the processing of orders from all sales channels. An OMS routes orders to the nearest warehouse, manages inventory updates across all channels, generates shipping labels, and sends tracking information to customers. Without an OMS you risk overselling (selling what you do not have), manual errors, and unhappy customers. Popular systems include Brightpearl, TradeGecko, and the built-in OMS features of enterprise e-commerce platforms.
One-Click Checkout
One-click checkout lets returning customers complete a purchase with a single click, without re-entering address and payment details. Amazon patented this concept in 1999; now services like Shop Pay (Shopify), Bolt, and Fast offer it to all stores. One-click checkout can increase conversion rates by 35% and reduce checkout time from minutes to seconds. It requires customers to have previously saved their details.
P
Payment Gateway
A payment gateway is the technology that processes and validates credit card and other online payments. The gateway encrypts card details, communicates with the customer's bank, checks for sufficient funds, and approves or declines the transaction — all in seconds. A payment gateway differs from a PSP: the gateway is the technical processor, while the PSP is the service provider that offers the gateway along with additional services. Stripe and Adyen are well-known gateways.
PSP (Payment Service Provider)
A PSP is a payment service provider that lets online stores offer multiple payment methods through a single integration. The PSP handles technical processing, money flow, and compliance. Globally, Stripe, Adyen, and PayPal are among the largest PSPs. When choosing a PSP, consider: supported payment methods, transaction fees, settlement speed (how quickly you receive your money), API quality, and customer support.
Personalization
Personalization in e-commerce means tailoring the shopping experience based on individual customer behavior, preferences, and history. Examples include personalized product recommendations, dynamic homepage content, customer-specific emails, and tailored search results. Stores that implement personalization see an average revenue increase of 10-15%. Tools like Clerk.io, Dynamic Yield, and Nosto analyze customer data and automatically display the most relevant products. Amazon generates 35% of its revenue through its "recommended for you" algorithm.
POS (Point of Sale)
A POS system is the checkout software and hardware used to process transactions in a physical store. Modern POS systems integrate with your online store for omnichannel management: the same inventory, customer data, and pricing across all channels. Lightspeed, Shopify POS, and Square are popular solutions. A good POS also offers staff management, reporting, and accounting software integrations. The integration of POS and online store is essential for a seamless customer experience.
Product Feed
A product feed is a structured file (XML, CSV, or JSON) containing all your product information: title, description, price, image URL, stock status, EAN code, category, and more. Your product feed sends data to Google Shopping, marketplaces, and comparison sites. Feed quality determines your visibility: optimized titles, complete attributes, and up-to-date prices lead to more impressions and higher click-through rates. Feed tools like Channable and DataFeedWatch automate feed management.
Product Page
The product page is where a visitor views an individual product — and decides whether to buy it. A high-converting product page includes: high-quality images (at least 5, with zoom), a clear title and price, social proof (reviews and ratings), scarcity indicators, a prominent CTA button, specifications, delivery information, and cross-sell suggestions. The product page is where most conversion optimization happens.
R
Returns
Returns are an unavoidable part of e-commerce — 15-30% of online purchases are returned, and in fashion the figure can reach 40%. A smooth return policy builds trust and boosts conversion, but high return rates eat into your margins. Strategies to reduce returns include better product photos and descriptions, size guides, reviews, fit technology, and video content. A sustainable return policy communicates the environmental impact and encourages customers to order more mindfully.
Revenue
Revenue is the total gross income your store generates before deducting costs. Gross revenue minus returns, discounts, and taxes gives you net revenue. In e-commerce analysis, you break down revenue by channel (organic, paid, direct, email), by product category, and by customer cohort. Revenue alone says little about profitability — always link it to costs and margins. A store with $1 million in revenue and a 2% net margin earns less than a niche store with $200,000 in revenue and a 20% margin.
ROAS (Return on Ad Spend)
ROAS measures how much revenue you generate per dollar of ad spend. A ROAS of 5 means $5 in revenue for every $1 spent on advertising. In e-commerce, ROAS is the most important metric for advertising campaigns. Google Shopping campaigns typically achieve a ROAS of 4-8, while prospecting campaigns on social media usually score lower (2-4). Calculate your break-even ROAS by dividing 1 by your profit margin: at a 25% margin, your break-even ROAS is 4.
S
SEO for E-commerce
SEO for e-commerce is search engine optimization specifically aimed at online stores. It encompasses technical SEO (site structure, load speed, canonical tags), on-page SEO (product pages, category pages, meta tags), and off-page SEO (link building, reviews). E-commerce SEO faces unique challenges: thousands of product pages, duplicate content from filters, seasonal products, and out-of-stock pages. A strong internal linking structure and optimized category pages form the foundation.
Shopify
Shopify is the most popular hosted e-commerce platform in the world, powering over 4.8 million online stores. It offers a user-friendly interface, hundreds of themes, thousands of apps, and built-in payments (Shopify Payments). Pricing starts at $39 per month. Shopify is ideal for startups and SMBs, while Shopify Plus (from $2,000/month) caters to enterprise. The Shopify App Store provides solutions for virtually every feature you could need, from reviews to loyalty programs.
Shopping Cart
The shopping cart is the digital basket where visitors collect products before checking out. A well-designed cart displays product images, quantities, subtotals, estimated shipping costs, and a clear button to the checkout. Common optimizations include a mini-cart (overlay without page reload), saved carts for returning visitors, cross-sell suggestions, and a progress bar toward free shipping ("Just $15 more for free shipping").
SKU (Stock Keeping Unit)
A SKU is a unique internal code you assign to each product or product variation. Unlike the EAN code (universal), a SKU is company-specific — you define your own naming convention. A T-shirt in size M and color blue might receive SKU "TS-BLU-M," for example. SKUs are essential for inventory management, order processing, reordering, and reporting. Use a logical, scalable system: category-attribute-variant. The larger your assortment, the more important a consistent SKU system becomes.
Social Commerce
Social commerce is selling products directly through social media platforms — Instagram Shopping, Facebook Shops, TikTok Shop, and Pinterest Shopping. Customers discover, browse, and buy products without leaving the platform. Social commerce in Europe grew by 25%+ in 2025. It combines the visual inspiration of social media with the directness of e-commerce. Successful social commerce requires strong visual content, influencer partnerships, and a product catalog synced with your online store.
SSL Certificate
An SSL certificate encrypts the connection between your customer's browser and your online store, recognized by the padlock icon and "https://" in the URL. SSL is absolutely mandatory for e-commerce: without it, payment data is transmitted unencrypted, Chrome displays a "Not Secure" warning, and your SEO ranking drops. All major e-commerce platforms offer free SSL. A store without SSL is untrustworthy and will systematically lose customers to competitors that are secure.
Subscription Commerce
Subscription commerce is a model where customers pay periodically for products or services — monthly surprise boxes, replenishment orders of everyday products, or access to exclusive content. Examples: HelloFresh (meal kits), Dollar Shave Club (razors), Birchbox (beauty). Advantages: predictable revenue, higher CLV, lower acquisition costs per order, and better inventory planning. The challenge is managing churn — which averages 5-7% per month in subscription commerce.
T
Theme
A theme is a pre-designed template that determines the look of your online store: layout, colors, typography, and page structure. Platforms like Shopify and WooCommerce offer thousands of themes — both free and paid ($50-350). A good e-commerce theme is responsive (adapts to all screen sizes), fast-loading, SEO-optimized, and designed for conversion. When choosing, consider: mobile experience, product presentation, checkout flow, and customizability without code.
3PL (Third-Party Logistics)
3PL is outsourcing your fulfillment to an external logistics company. The 3PL partner stores your products, processes orders, packs, ships, and handles returns. Advantages: no warehouse needed, scalable as your revenue grows, logistics expertise, and often lower shipping rates through volume discounts. ShipBob, Deliverr, and Rakuten Super Logistics are well-known 3PL providers. 3PL becomes worth considering at around 100-200 orders per month.
Tracking (Shipment Tracking)
Tracking gives customers real-time visibility into their order status: processed, shipped, in transit, delivered. A tracking code sent via email or SMS is standard in e-commerce. Proactive tracking information reduces "where is my order?" customer service inquiries by 25-50%. Advanced tracking solutions like AfterShip and Route offer branded tracking pages — an additional touchpoint you can leverage for cross-selling and branding.
U
Upselling
Upselling is offering a more expensive version or upgrade of the product a customer is considering. "Want the Pro version for just $20 more?" is a classic example. The difference from cross-selling: upselling offers a better alternative, while cross-selling offers a complement. Effective upselling clearly shows the added value of the pricier option — not just the price difference. Upselling on the product page and in the cart increases AOV by an average of 10-30%.
UX (User Experience)
The user experience is the total experience a customer has when using your online store. Good UX means intuitive navigation, fast load times, clear product information, simple checkout, and a frictionless mobile experience. UX research via heatmaps, session recordings, and usability tests reveals where visitors get stuck. Investing in UX improvements often yields more conversions than investing in additional traffic — it is cheaper to convert existing traffic better than to acquire new visitors.
UGC (User-Generated Content)
User-generated content is content created by customers: reviews, photos, videos, social media posts, and unboxing videos. UGC is powerful social proof: 79% of consumers trust UGC more than brand messaging. Encourage UGC through post-delivery review requests, hashtag campaigns, photo contests, and rewards. Display UGC prominently on product pages and in ads. Platforms like Yotpo and Trustpilot automate the collection and display of customer content.
V
Value Proposition
The value proposition is the promise your store makes to potential customers: why should they buy from you instead of a competitor? A strong value proposition is specific, measurable, and unique. "The lowest price" is weak; "Not satisfied? Full refund within 24 hours, no questions asked" is strong. Your value proposition should be visible above the fold on every page, communicated in your marketing campaigns, and reinforced by reviews and guarantees.
Shipping Costs
Shipping costs are the biggest conversion killer in e-commerce: unexpected fees are the number-one reason for cart abandonment. Strategies include free shipping above a threshold (which encourages higher AOV), flat-rate shipping, free shipping as a USP (baked into the product price), or fast premium shipping as an option alongside standard free delivery. Display shipping costs as early as possible — ideally on the product page — to avoid surprises at checkout.
Visual Search
Visual search lets customers search for products by uploading an image instead of typing text. Google Lens, Pinterest Lens, and ASOS's search engine use AI to recognize the product in the photo and show similar items. Visual search is growing fast: 36% of online shoppers have already used it. For stores, this means investing in high-quality, clear product photos on a neutral background so visual search algorithms can correctly identify your products.
W
WMS (Warehouse Management System)
A WMS is software that digitizes all warehouse activities: goods receiving, storage locations, order picking, packing, and shipping. A WMS increases inventory accuracy to 99%+, speeds up order processing time, and reduces errors. For growing stores, a WMS becomes essential once manual management leads to mistakes and delays — typically at 200-500 orders per month. Popular systems include ShipHero, Logiwa, and the WMS modules built into your e-commerce platform.
Webshop (Online Store)
A webshop or online store is a website where consumers or businesses can purchase products or services online. Unlike a website that only informs, a store features a product catalog, shopping cart functionality, checkout, and payment integration. Success depends on product selection, user experience, marketing, and logistics. A professionally designed landing page can maximize your conversion rate.
White Label
White label products are manufactured by one company but sold by another under its own brand name. In e-commerce, white labeling is a popular model: you purchase products from a manufacturer, add your own branding and packaging, and sell them through your store. Advantages include no product development costs, fast time to market, and higher margins than dropshipping. Downsides: you depend on the manufacturer's quality and the product is not unique.
Wishlist
A wishlist lets customers save products they want to buy later. Wishlists extend the customer journey and provide valuable data about purchase intent. Use wishlist data for personalized emails: "Your wishlist item is on sale!" or "Almost sold out: your saved product." On average, 40% of wishlist emails convert. It typically requires account registration, which is a barrier — consider a "save via email" option without an account.
WooCommerce
WooCommerce is a free, open-source e-commerce plugin for WordPress — the world's most popular CMS. WooCommerce powers more than 5 million online stores. Advantages include no licensing costs, full control over code and data, thousands of plugins, and a massive community. Downsides: you are responsible for hosting, security, updates, and performance optimization. WooCommerce is ideal for stores that want maximum flexibility and have technical expertise in-house or outsourced.
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Zero-Party Data
Zero-party data is information that customers intentionally and proactively share: preferences, interests, purchase intentions, and personal details via quizzes, surveys, or account profiles. Unlike first-party data (collected through behavioral observation), customers actively provide zero-party data. With the decline of third-party cookies, zero-party data is becoming increasingly valuable for personalization. A fashion store that collects preferences through a style quiz can immediately make personalized recommendations — with explicit consent.
Social Proof
Social proof is the psychological principle that people follow the behavior of others — in e-commerce translated into reviews, ratings, trust badges, "X people bought this today" notifications, and media logos. Stores with reviews convert 270% better than those without. Effective forms of social proof include star ratings on product pages, customer testimonials with photos, trust badges, real-time purchase notifications, and user-generated content. Always start with collecting reviews.