An online store is a website or platform that allows businesses to sell products or services to customers over the internet. It typically consists of a catalog of items, a shopping cart, and a checkout process. Customers can browse through the products, add items to their cart, and complete their purchase using a secure payment system. Online stores can range from small independent shops to large retail chains, and can sell a variety of items, including physical products, digital downloads, subscriptions, and services. Examples of popular online stores include Amazon, eBay, and Shopify.