What is e-commerce? A simple guide with examples and trends

E-commerce (electronic commerce) means buying and selling goods or services over the internet. It is more than a web shop. It also covers online bookings, digital products, subscriptions, B2B ordering between companies, online payments and electronic documents. In short, any sale that happens through a digital channel.

How an e-commerce business works

1. The customer finds you: through search, advertising, social media, email or a marketplace.
2. Chooses a product on your site or app and puts it in the basket.
3. Pays with a card, bank transfer, a wallet or buy-now-pay-later.
4. You process the order: check stock, pack, hand over to the carrier.
5. The customer receives the goods, may return them, and you ask for a review and offer a next purchase.

Main types

• B2C (business to consumer): a shop that sells to private customers.
• B2B (business to business): sales to companies, often with price lists, invoices and repeat orders.
• C2C (consumer to consumer): marketplaces where individuals sell to each other.
• D2C (direct to consumer): a brand sells its own products directly, without middlemen.
• Digital products and subscriptions: software, courses, memberships, with no physical delivery.

Examples

• Large marketplaces such as Amazon, Etsy and Zalando bring a huge audience, but they take a fee and you compete on price.
• Dollar Shave Club started by selling razors on subscription directly to customers and grew fast with simple, funny marketing.
• Warby Parker sells glasses online, letting customers try five frames at home.
• TOMS built a brand on the idea "one for one": each purchase supports a donation.

Advantages and disadvantages

• Advantages: open 24/7, wide reach, lower fixed costs than a physical shop, easy measurement and testing, personal offers.
• Disadvantages: strong competition and price comparison, advertising costs, returns, logistics, delivery problems, fraud and the fact that customers cannot touch the product.

Numbers that matter

• Conversion rate: the share of visitors who buy.
• Average order value: how much a customer spends per order.
• Customer acquisition cost: the cost of winning one new customer.
• Lifetime value: total spend of a customer over time.
• Cart abandonment: the share who add to the cart but do not finish.
• Return rate: a high number points to problems with descriptions, sizes or quality.

Payments and security

• Offer the payment methods your customers already use, and keep checkout short.
• Use HTTPS and a trusted payment provider, so you never store card numbers yourself.
• Follow GDPR: ask for consent, explain what you do with data and let customers delete their account.

Trends to watch

• Mobile first: most visits come from phones. A fast mobile site, or a PWA, is no longer optional.
• Own brand products with better margins.
• Personalisation with AI: recommendations, chat assistants and automatic descriptions.
• Subscriptions and repeat orders for goods that run out.
• Social selling: buying directly in social media apps.
• Sustainability and transparent delivery: customers compare return policy and environmental impact.

Start simple: a clear offer, a fast site, honest delivery terms and a customer service you can answer within a day.