eCommerce is the buying and selling of goods or services over the internet. It covers everything from a solo founder selling candles on Shopify to a global retailer like Amazon shipping millions of orders a day. If a transaction happens online instead of in a physical store, it’s eCommerce.
According to the U.S. Census Bureau’s Q1 2026 retail report, online sales accounted for 16.8% of total U.S. retail sales, up from 16.3% a year earlier. That share has climbed almost every quarter since 2010, which is why understanding eCommerce, how it works, and how to start selling online matters more than ever for new business owners.
How Does eCommerce Work?
eCommerce works through three connected systems: a storefront, a payment processor, and a fulfillment process.
- Storefront: This is where customers browse and buy.
It can be a full platform like Shopify or WooCommerce, a marketplace listing on Amazon or Etsy, or a social storefront on TikTok Shop or Instagram.
- Payment processing: When a customer checks out, a payment gateway such as Stripe, PayPal, or Shopify Payments verifies the card or wallet, moves the funds, and confirms the order.
- Fulfillment: The order gets packed and shipped.
This can be handled by the seller, by a third-party logistics company, or by the platform itself, as with Amazon FBA or TikTok Fulfilled Products.
You don’t need to build all three from scratch. Most beginners start with a platform like Shopify or WooCommerce, which bundle the storefront and payment processing together so you only need to handle fulfillment, or hand it off to a third party as your order volume grows.
How Do eCommerce Businesses Make Money?
eCommerce businesses make money the same way physical retailers do: by selling a product or service for more than it costs to source, make, and deliver. What changes online is where the costs show up.
Instead of rent and in-store staff, an online seller typically pays for:
- Platform or hosting fees: A monthly subscription, like Shopify, or hosting costs, like WooCommerce
- Payment processing fees: Usually 2.5% to 3% per transaction
- Shipping and fulfillment: Packaging, postage, and warehousing if you don’t ship from home
- Customer acquisition: Ads, influencer partnerships, or SEO content to get people to your store
- App or software costs: Email marketing tools, inventory software, and similar add-ons
Because there’s no retail rent to cover, eCommerce margins can be healthier than a comparable physical store. Customer acquisition costs have risen sharply, though, as more brands compete for the same ad space. That’s part of why a clear platform and marketing plan matters before you launch, not after.
eCommerce vs. Retail: What’s the Difference?
eCommerce is selling through digital channels, while retail traditionally means selling through a physical store. The biggest practical differences are overhead, reach, and how customers discover you.
| Factor | eCommerce | Traditional Retail |
|---|---|---|
| Reach | Anywhere with internet access | Limited to local foot traffic |
| Overhead | Platform fees, no rent | Rent, utilities, in-store staff |
| Customer experience | No physical touch, relies on photos and reviews | In-person, can try before buying |
| Discovery | SEO, ads, social, marketplaces | Foot traffic, signage, local marketing |
| Startup speed | Days to weeks | Weeks to months (lease, buildout) |
A physical retail store is limited by foot traffic and a fixed location. An eCommerce store can reach customers anywhere with internet access, often with lower overhead since there’s no retail square footage to pay for. The trade-off is that you take on shipping costs and lose the in-person experience that drives impulse buys in a physical shop.
Many businesses now run both, an approach usually called omnichannel retail. A boutique might sell from a physical storefront and a Shopify site at the same time, using the same inventory pool. For a full side-by-side breakdown, see our guide on eCommerce vs. retail.
Types of eCommerce Business Models
Most online stores fall into one of these four models, based on who’s selling to whom:
| Model | Who Sells | Who Buys | Example |
|---|---|---|---|
| B2C (Business to Consumer) | Business | Individual consumer | A Shopify store selling skincare to shoppers |
| B2B (Business to Business) | Business | Another business | A wholesaler selling bulk inventory to retailers |
| D2C (Direct to Consumer) | Brand or manufacturer | Individual consumer | A clothing brand selling from its own site, skipping retailers |
| C2C (Consumer to Consumer) | Individual | Individual | A seller listing used items on eBay or Facebook Marketplace |
Most first-time founders start with a B2C or D2C model because it requires the least setup and the fewest contracts to get moving. B2B eCommerce, by contrast, often involves bulk pricing, purchase orders, and longer sales cycles, even though the underlying technology looks similar.
Examples of eCommerce in Everyday Life
eCommerce shows up in more places than most people realize:
- Online marketplaces: Amazon, Etsy, and eBay, where multiple sellers list products in one place
- Branded online stores: A single business selling through its own Shopify or WooCommerce site
- Social commerce: Buying directly inside an app, like TikTok Shop or Instagram Shopping
- Subscription commerce: Recurring orders like meal kits or beauty boxes
- Digital products: Online courses, software, or downloadable templates sold without any physical shipping
- B2B procurement portals: Businesses ordering supplies or inventory through a wholesaler’s online catalog
Each of these runs on the same basic structure, a storefront, a payment system, and fulfillment, even though the customer experience looks very different from one to the next.
Why eCommerce Matters for Your Business
eCommerce matters because it removes the geographic limits and overhead costs that hold back physical-only businesses. You can launch a store, list products, and start taking orders in a weekend, often for less than the cost of one month’s rent on a retail space.
It also matters because customer behavior has already shifted. With nearly one in six U.S. retail dollars now spent online according to the Census Bureau’s latest data, a business with no online presence is competing for a shrinking share of in-person foot traffic. Statista’s tracking of the same Census data shows this growth has been steady for over a decade, not a short-term pandemic spike.
For a non-technical founder, the real advantage is speed. Platforms like Shopify or BigCommerce handle hosting, security, and checkout, so you can focus on products and marketing instead of building infrastructure from scratch.
Common eCommerce Challenges to Know Before You Start
eCommerce removes some barriers but introduces others that a physical retailer doesn’t face. Knowing these upfront helps you plan instead of getting surprised by them six months in.
- Shipping costs and delays: You’re responsible for packaging and delivery times.
This directly affects how satisfied customers are with the buying experience.
- Returns management: Online shoppers return products at higher rates than in-store buyers, since they can’t try before they buy
- Rising ad costs: As more brands compete for the same online audience, customer acquisition costs continue to climb
- Platform dependency: Selling through a marketplace like Amazon or a social platform like TikTok Shop means operating under someone else’s rules and algorithm changes
- Trust signals: New stores have to work harder to earn buyer trust without a physical location customers can walk into
None of these are reasons to avoid eCommerce. They’re simply costs of doing business online that a realistic plan should account for from day one.
How to Start Selling Online
Starting an eCommerce business comes down to five steps: pick a business model, choose a platform, set up payments, list your products, and drive traffic to your store.
- Decide what you’re selling and to whom: physical products, digital products, or a service.
You’ll also need to decide whether you’re targeting individual consumers or other businesses, since that shapes everything from pricing to platform choice.
- Choose a platform: Shopify and BigCommerce are fully hosted and beginner-friendly, while WooCommerce gives more control if you’re comfortable with WordPress
- Set up payment processing: most platforms include this by default through Shopify Payments, Stripe, or PayPal
- List your products: write clear descriptions, use real photos, and set accurate shipping costs
- Drive your first traffic: through organic social, paid ads, or a marketplace listing while your own SEO builds up
For the full walkthrough with setup checklists, see our complete guide on how to start an eCommerce store. If budget is your main concern before you commit to a platform, our breakdown of the cost to start an online store shows real numbers by business type.
Is eCommerce Right for Your Business?
eCommerce makes the most sense if your product can be photographed, described, and shipped without losing the value of an in-person experience. Physical goods, digital downloads, and many services fit this well. Businesses that depend heavily on touch, taste, or in-person fitting, like custom tailoring or fine dining, tend to do better leading with a physical presence and treating eCommerce as a secondary channel.
The good news is that you don’t have to decide irreversibly. Most platforms let you start small, list a handful of products, and scale up only once you’ve validated demand. A founder testing a product idea can launch a basic Shopify or WooCommerce store for a fraction of the cost of opening a physical location, then reinvest profits into inventory, ads, or a second sales channel once the first one proves itself.
The next decision most beginners face is which platform to build on. Shopify, WooCommerce, and BigCommerce all solve the same core problem in different ways, with trade-offs in cost, control, and ease of use that are worth understanding before you commit to one.
FAQ’s
What is eCommerce in simple terms?
eCommerce is buying or selling products or services online instead of in a physical store. It includes everything from a single Shopify shop to large marketplaces like Amazon.
What’s the difference between eCommerce and an online store?
An online store is one specific example of eCommerce. eCommerce is the broader category that also includes marketplaces, social commerce, and B2B ordering portals.
Is eCommerce the same as dropshipping?
No. Dropshipping is one business model within eCommerce, where you sell products without holding inventory yourself. eCommerce also includes models where you stock and ship your own products.
How much does it cost to start an eCommerce business?
Costs vary widely by platform and business model, typically ranging from under $50/month on a budget WooCommerce setup to $39 to $105/month or more on Shopify, plus product and marketing costs.
What percentage of retail sales happen online?
According to the U.S. Census Bureau’s Q1 2026 report, eCommerce accounted for 16.8% of total U.S. retail sales, and that share has grown steadily every year since 2020.
Do I need technical skills to start an eCommerce business?
No. Platforms like Shopify and BigCommerce are built for non-developers, with drag-and-drop store builders and built-in payment processing. WooCommerce requires a bit more WordPress familiarity but still needs no coding for a basic setup.
What is the easiest eCommerce platform for beginners?
Shopify is generally considered the easiest for complete beginners because it bundles hosting, payments, and store design into one managed platform, handling security and checkout so you don’t need any coding experience.
Can I run an eCommerce business and a physical store at the same time?
Yes. This is called omnichannel retail, and it’s increasingly common among small business owners. Many founders start with one channel and add the other once they have a stable customer base and inventory system in place.