If you landed here searching for "what is ecommerce", you probably already have a reasonable hunch. And yes, the hunch is correct. Ecommerce (or electronic commerce, which is exactly the same thing with its full name) is any buying and selling of products or services that happens over the internet. When you order sneakers through a store's app, sign up for an online course, or buy supplies from a vendor's portal, you are taking part in ecommerce.
That covers the dictionary definition. The interesting part comes when you look at how it works on the inside, the shapes it can take, and what it actually requires for an online store to sell, because that is where most projects that launch with enthusiasm and die within six months get decided.
What is ecommerce, exactly?
The word sounds like technology, but ecommerce is first and foremost a business model. Amazon started in 1994 selling books online, and Mercado Libre was born in 1999 bringing the idea to Latin America. What has changed since then is the scale and how easy it is to participate. Today you don't need a team of engineers to sell online. You need a product, a way to charge, and a way to deliver.
It helps to separate two concepts that get mixed up all the time. The online store is the site or app where the customer browses products and pays. Ecommerce is the full operation behind it, which includes the store but also inventory, payments, shipping, returns, and customer service. It's the difference between a shop's window display and the shop actually running. You can have a beautiful online store and a disastrous ecommerce operation, and the customer notices on the second purchase (if there is a second purchase).
The umbrella also covers much more than a store of your own. Selling through a marketplace like Mercado Libre or Amazon, selling through social media and closing the payment by bank transfer, or selling digital services by subscription: all of that is ecommerce. The channel changes, the underlying logic stays the same.
How does an ecommerce operation work on the inside?
A physical store has a window display, a register, a stockroom, and someone at the counter. An ecommerce operation has the same organs, just in digital form.
The catalog is the window display. Every product has its page with photos, price, description, and stock. The cart and checkout are the register, the process where the customer decides, enters their details, and confirms. The payment gateway is the equivalent of the card terminal, a service that makes sure money travels from the customer's card or digital wallet to your account without you ever touching sensitive data along the way. Logistics is the stockroom and the delivery route, meaning how the product physically reaches the customer's door. And after-sales is the person at the counter, answering questions and handling exchanges and returns.
In Peru, and in Latin America generally, that circuit has its quirks. Digital wallets have become an everyday payment method, cash on delivery is still alive in several categories because part of the audience remains wary of entering card details, and last-mile logistics can be the most expensive and most fragile link in the whole chain. An ecommerce operation that works is one with all five organs healthy, not just a pretty storefront.
What types of ecommerce exist?
The classic classification is built around who sells to whom:
- B2C (business to consumer): a company sells to individuals. The most visible case, the clothing or electronics store selling to the general public.
- B2B (business to business): a company sells to other companies. A medical supplies distributor with an ordering portal for clinics, for example. It moves enormous amounts of money even if it has less of a storefront.
- C2C (consumer to consumer): people selling to people, with a platform in the middle. Second-hand marketplaces work this way.
- D2C (direct to consumer): a brand that manufactures and sells directly to the end customer, skipping distributors and third-party retailers. The favorite model of newer brands, because it keeps the full margin and the direct customer relationship.
In practice the borders blur. The same company can sell to the public through its own store, to businesses through a wholesale portal, and also have a presence on marketplaces. It's not an exam where you have to pick a single answer.
Your own store or a marketplace?
This is the first strategic decision for almost everyone starting out, so it deserves a calm look.
The marketplace lends you the most expensive thing to get, which is traffic. You publish today and tomorrow your product can appear in front of thousands of people who arrived with purchase intent. In exchange, you pay a commission per sale, you compete on the same page with other sellers of the same product, and the buyer is registered as the marketplace's customer, not yours. It's hard to build a brand when your storefront looks identical to your neighbor's.
Your own store is the reverse path. At the beginning it's a shop on an empty street, and nobody walks by until you work on visibility. But the margin is yours, the customer data is yours, and every dollar you invest in being found accumulates in an asset you own instead of feeding someone else's platform.
My pragmatic take is that for validating whether a product sells, the marketplace is an excellent laboratory. For building a business with a brand and repeat customers, your own store becomes necessary sooner or later. Most mature ecommerce operations end up running both channels at once, with different roles.
What do you need to start an ecommerce business?
The full recipe, nothing held back:
- A defined product and a defined buyer. "I sell everything to everyone" is the fastest way to sell to no one. Starting narrow works better, one clear category for one clear type of customer, and widening later.
- A sales channel. It can be a store platform of your own (Shopify, WooCommerce, and similar tools solve the technical side for a reasonable monthly fee), a marketplace, or both. To start, pick the one that gets you selling this month, not the most sophisticated one.
- Payment methods. The more real options you give the customer (card, digital wallet, bank transfer), the fewer sales you lose at the last step. Every bit of friction at payment is money left sitting in the cart.
- Logistics defined before the first sale. Who packs, which courier you ship with, what shipping costs and who pays for it, what happens when a product comes back. Improvising this with orders already coming in gets expensive in reputation.
- Content that builds trust. Decent photos of your own, descriptions that answer the buyer's real questions, visible return policies, a phone number or WhatsApp that actually answers. Online buyers decide with their eyes and with the level of trust you transmit in two minutes.
- A concrete plan for getting visitors. This point deserves its own section, because it's the most underestimated one.
How will people reach your store?
I'd bet that most ecommerce budgets you've seen assign almost everything to the store and almost nothing to this question. The plan is usually "we launch and post on social media". And a store without traffic simply doesn't exist for the market, no matter how well built it is.
Visits arrive through known paths. Search engines, when your categories and product pages answer what people already search for (I wrote a full guide on ecommerce SEO). Social media, which works as a discovery window more than a closing channel. Email marketing, still the most profitable channel for bringing a customer back. And paid advertising, which accelerates all of the above as long as your margin can fund it.
A new actor joined that map. More and more purchases start with a question to an AI assistant instead of a Google search, and agents that compare and recommend products on the user's behalf are already operating. I wrote about what agentic shopping is and how to prepare your ecommerce for that layer if you want to go deeper. The honest summary is that the fundamentals look familiar: complete, structured product data, clear prices and stock, and a brand that machines can understand and cite.
The mistakes I see most often at the start
The first is launching the store and sitting back to wait, as we covered. The second is competing on price alone, a race where someone willing to lose more money than you always shows up. The third is copying and pasting the supplier's descriptions, which makes your product page identical to twenty other stores and gives no search engine (and no AI) a reason to show yours. The fourth is improvised logistics, with shipping costs appearing as a surprise at checkout, the classic cause of cart abandonment. And the fifth is measuring nothing, operating for months without knowing what it costs you to win a customer or what each one brings in, which is like driving at night with the lights off. If the full funnel feels fuzzy, here's my explainer on how a sales funnel works.
To wrap up
You already have the short definition of ecommerce, selling products or services over the internet. The version that helps you make decisions is a bit longer, because it includes the whole operation behind the store and gives visibility the same weight as the product.
If you're considering starting, there's an exercise you can do tomorrow that costs nothing. Write down the ten questions a customer would ask before buying from you (how long does shipping take, what if it doesn't fit, is it original, can I pay with a digital wallet). Then check whether your store, or the store you plan to build, answers each one without the customer having to ask. That exercise is worth more than any premium template, because the missing answers are exactly where sales get lost.