Ecommerce is the buying and selling of goods or services online, with the order, and usually the payment, completed over the internet. It covers a maker selling candles from her own website as much as a national retailer, a wholesaler taking orders through a trade portal, or a brand that sells only on Amazon.
How ecommerce works
Every online sale runs through the same chain, whatever the size of the business:
- The storefront. Product pages, category pages, a basket and a checkout, usually built on an ecommerce platform such as Shopify, WooCommerce or Magento, or on a marketplace’s own listing pages.
- Payment. A payment provider takes the card, wallet or buy-now-pay-later payment, runs Strong Customer Authentication where needed and passes the money on, minus a fee.
- Stock and orders. The order reduces stock, appears in an order system and is picked, packed and dispatched, either by you or by a third-party warehouse.
- Delivery and after-sale. The parcel goes out with Royal Mail or a courier; returns, refunds and customer service follow.
- Marketing. Search, Shopping ads, social ads, email and marketplaces bring people to the storefront in the first place.
The common models are business to consumer (B2C), business to business (B2B), direct-to-consumer brands that make their own products and sell without a retailer in between, subscriptions, and selling through an online marketplace such as Amazon, eBay or Etsy. Many UK businesses mix several: their own site, one or two marketplaces and a physical shop.
Why ecommerce matters for a UK business
Selling online removes the limit of a catchment area. A potter in Cornwall can sell to a buyer in Glasgow, and a London boutique can take orders at 2am. The flip side is competition: on a search results page your shop sits beside the biggest retailers in the country, and shoppers compare prices and delivery terms in seconds.
It also brings legal duties specific to selling at a distance. The Consumer Contracts Regulations 2013 give most online shoppers a 14-day right to cancel, the Consumer Rights Act 2015 sets rules on delivery and faulty goods, UK GDPR and PECR govern the personal data and marketing emails you handle, and prices shown to consumers must include VAT. None of this is optional because a business is small.
For marketing, ecommerce is unusually measurable. Each sale has a value, so you can see which channel, campaign and search term produced revenue, and make decisions on profit rather than on clicks.
Common mistakes
- Judging success by revenue alone. Turnover can grow while the business loses money on delivery, returns and ad costs. Track margin per order.
- Thin product pages. Copying the manufacturer’s description onto hundreds of pages gives search engines and shoppers no reason to choose you over every other stockist.
- Neglecting the checkout. Forced account creation, surprise delivery charges and slow mobile pages lose sales the marketing has already paid for.
- Relying on one channel. A shop that depends entirely on one marketplace or one ad platform is exposed when fees or rules change.
- Not tracking properly. Without working purchase tracking, every marketing decision is a guess.
How to act on it
If you are starting out, choose a platform that fits your range and budget, then put more effort into product photography, clear delivery and returns information and a simple checkout than into design flourishes. Set up purchase tracking in GA4 before you spend anything on ads.
If you already trade online, look at three numbers together each month: conversion rate, average order value and the cost of acquiring a customer. Between them they explain most movements in revenue, and they show where effort will pay off: more traffic, better persuasion or bigger baskets.
Organic search is often the cheapest long-term source of buyers, because category and product pages keep earning visits without a cost per click. My ecommerce SEO service covers the site structure, product and category content and technical fixes that online shops most often need.