An e-commerce platform is a software application that enables businesses to buy and sell products or services online. These platforms provide tools for managing online stores, processing payments, and handling inventory. Popular examples include Shopify, Amazon, and eBay. E-commerce platforms can cater to various business sizes, from small startups to large enterprises. They often offer features like customizable storefronts, marketing tools, and customer support, making it easier for businesses to reach a global audience and streamline their operations.