What Is E‑Commerce? The Complete Guide to Selling Online in 2025

Ecommerce is simply buying and selling online, and it now shapes how most people shop. From a one-person store on Shopify to Amazon and Alibaba, ecommerce covers any transaction that happens over the internet. This guide explains what ecommerce is, how it works, the main types and models, the platforms behind it, and how to start an online store in Singapore.

Quick answer: Ecommerce (electronic commerce, also written e-commerce) is the buying and selling of goods and services over the internet, along with the payments and data that make those transactions work. It spans online stores, marketplaces, and social commerce, across models like B2C, B2B, C2C, and D2C. If money changes hands online, that is ecommerce.

What is ecommerce?

Ecommerce is any commercial transaction conducted over the internet. That includes a customer buying shoes from an online store, a business ordering supplies from a wholesaler’s portal, someone selling a used phone on a marketplace, and a subscription billed to a card each month. The product can be physical (a package that ships to you), digital (software, an ebook, a course), or a service (a booking or membership).

Behind every sale sits the same basic chain: a storefront where the customer browses and orders, a payment system that takes the money securely, and fulfilment that delivers the product or service. Ecommerce is the whole of that, not just the shop front.

How ecommerce works

A typical online purchase runs through five steps:

1. The customer visits an online store, marketplace, or social shop.
2. They browse and add to cart, choosing products, sizes, or plans.
3. They check out, entering delivery and payment details.
4. The payment is processed securely through a payment gateway.
5. The order is fulfilled, picked, packed, and shipped, or delivered digitally, with tracking and support after the sale.

Making that smooth is the whole job of an ecommerce business: a fast, clear store; trusted payment options; and reliable delivery. See our guide to payment gateways in Singapore.

Types of ecommerce (business models)

Ecommerce is usually grouped by who is selling to whom.

Most Singapore SMEs operate B2C or D2C, selling their own products directly to customers through their own store.

Ecommerce revenue and sourcing models

How you get and sell products also varies:

• Own-inventory retail: you stock and ship your own products.
• Dropshipping: a supplier ships directly to the customer, so you hold no stock.
• Private label and white label: you brand a manufacturer’s product as your own.
• Wholesale: you sell in bulk to other businesses.
• Subscription: recurring billing for ongoing products or access.

Where ecommerce happens: the channels

• Your own online store, which you fully control and own.
• Marketplaces like Amazon, Lazada, and Shopee, with built-in traffic but fees and competition.
• Social commerce, selling directly on Instagram, TikTok Shop, and Facebook. See social commerce in Singapore.
• Mobile commerce, the growing majority of shopping done on phones.

The strongest brands run more than one channel, with their own store at the centre so they are not dependent on a marketplace’s rules.

Ecommerce platforms compared

Your platform is the software your store runs on. The main options:

For most Singapore businesses the real choice is Shopify vs WooCommerce; see our Shopify vs WordPress comparison. Whatever you pick, the store needs to be fast, mobile-first, and built to rank, which is where ecommerce SEO comes in.

Benefits and drawbacks of ecommerce

The drawbacks are all manageable with a good store, clear delivery, and solid support, which is why planning matters more than the platform choice alone.

Ecommerce in Singapore

Singapore is one of the most connected markets in the world, with near-universal internet access and shoppers who research and buy online across marketplaces, brand stores, and social. For a local business, that means an online store is no longer optional. A few local factors to plan for:

• Payments: offer the methods Singapore shoppers expect, including cards, PayNow, and popular wallets.
• Delivery: reliable local logistics and clear delivery timelines.
• Compliance: handle customer data in line with the PDPA.
• Grants: eligible SMEs can offset up to 50% of a qualifying ecommerce build through the PSG grant.

How to start an ecommerce business

1. Choose what to sell and validate there is demand.
2. Pick a business model (own inventory, dropshipping, D2C, and so on).
3. Choose a platform (Shopify or WooCommerce for most SMEs).
4. Build the store: clear product pages, fast performance, mobile-first design.
5. Set up payments and delivery that local customers trust.
6. Launch and market: SEO, social, email, and paid ads to drive traffic.
7. Measure and improve using real data.

For budgets, see the cost of ecommerce website development in Singapore.

Measuring ecommerce success: the KPIs

Judge an online store on the numbers that connect to revenue:

• Conversion rate: how many visitors buy
• Average order value (AOV): revenue per order
• Customer acquisition cost (CAC): what it costs to win a customer
• Customer lifetime value (LTV): total value of a customer over time
• Cart abandonment rate: how many carts are left unpaid
• Return on ad spend (ROAS): revenue per dollar of ad spend

Ecommerce trends for 2026

• Social and live commerce keep growing, especially TikTok Shop and live selling.
• Mobile-first is now the default, not a nice-to-have.
• AI powers personalisation, search, and support across stores.
• AI search and GEO: shoppers research through ChatGPT and AI Overviews, so being found there matters.
• Sustainability and fast, transparent delivery increasingly influence where people buy.

Frequently asked questions

What is ecommerce in simple terms?

Ecommerce is buying and selling goods or services over the internet, along with the payments and delivery that complete each transaction.

What is the difference between ecommerce and an ecommerce website?

Ecommerce is the whole activity of selling online across any channel. An ecommerce website is one specific storefront you own and control, where customers browse and buy.

What are the main types of ecommerce?

The common models are B2C (business to consumer), B2B (business to business), C2C (consumer to consumer), and D2C (direct to consumer), plus C2B and B2G.

Which platform is best for ecommerce?

Shopify suits most SMEs wanting a fast, managed store; WooCommerce offers more control and flexibility on WordPress; enterprise platforms like Magento suit large, complex catalogues.

How much does it cost to start an online store in Singapore?

A template store can start in the low thousands, and a custom build runs higher. Eligible SMEs can offset up to 50% through the PSG grant.

Is ecommerce still worth starting in 2026?

Yes. Online shopping keeps growing, and a well-built, well-marketed store reaches customers a physical shop never could. The key is standing out with a fast store, strong SEO, and reliable delivery.

Start selling online with MediaPlus

Ecommerce rewards businesses that build a fast, trusted store and market it well. If you want an online store built to convert and rank, talk to MediaPlus Digital. Explore our ecommerce website development, Shopify design and development, and ecommerce SEO services, with PSG support for eligible SMEs.