E-commerce (short for electronic commerce) is the buying and selling of products or services over the internet. It spans four main types — B2C, B2B, C2C, and C2B — and runs on revenue models like direct sales, subscriptions, and marketplaces. Online sales now exceed $5 trillion a year globally.
What Is E-commerce?
E-commerce is any commercial transaction conducted online: a customer browses, buys, and pays through the internet rather than in a physical store. It covers retail websites, mobile apps, online marketplaces, and digital-goods delivery. (Fun fact: the first e-commerce transaction was a 1994 Pizza Hut order.)
Types of E-commerce
| Type | Who sells to whom | Example |
|---|---|---|
| B2C | Business → consumer | An online store selling to shoppers |
| B2B | Business → business | A wholesaler supplying retailers |
| C2C | Consumer → consumer | Marketplaces like eBay or Etsy |
| C2B | Consumer → business | A freelancer selling services to a company |
Why E-commerce Matters
- Global reach: sell to customers worldwide without physical stores.
- 24/7 operations: generate sales around the clock.
- Cost efficiency: lower overhead than rent and staffing for storefronts.
- Scalability: grow without proportional investment in space.
- Consumer alignment: matches modern expectations for convenience.
Common E-commerce Revenue Models
| Model | How it earns |
|---|---|
| Direct sales | One-time purchases, subscriptions, digital downloads |
| Marketplace | Commission, listing fees, premium ad placement |
| Hybrid / omnichannel | Click-and-collect, online + in-store, digital-first |
Key E-commerce Metrics to Track
- Conversion rate: share of visitors who buy.
- Average order value (AOV): average spend per transaction.
- Cart abandonment rate: share of shoppers who leave before checkout.
- Customer acquisition cost (CAC): cost to win each customer.
- Customer lifetime value (CLV): total revenue per customer over time.
- Return rate: share of purchases sent back.
Best Practices for E-commerce Success
- Optimize for mobile: most traffic is on phones — the site must work flawlessly there.
- Show quality images: high-resolution photos from multiple angles.
- Write clear descriptions: features, benefits, and specs up front.
- Offer multiple payment options: let customers pay their preferred way.
- Streamline checkout: fewer steps cut cart abandonment.
- Prioritize security: encryption and trusted payment methods protect data.
E-commerce FAQ
What is e-commerce in simple terms?
It's buying and selling products or services online — through websites, apps, or marketplaces — instead of in a physical store.
What are the main types of e-commerce?
The four main types are B2C (business to consumer), B2B (business to business), C2C (consumer to consumer), and C2B (consumer to business).
What's the difference between e-commerce and e-business?
E-commerce is specifically the buying and selling transaction online. E-business is broader — it covers all online business activity, including operations, supply chain, and customer service.
Which metrics matter most in e-commerce?
Conversion rate, average order value, cart abandonment, CAC, and customer lifetime value together show whether an online store is profitable and growing.
