The purpose of an e-commerce platform is to facilitate online buying and selling of goods and services. These platforms provide a virtual storefront, integrating features such as product listings, shopping carts, and secure payment processing. E-commerce platforms enable businesses to reach a global audience, streamline order management, and improve customer experience through personalization and ease of use. Popular examples include Shopify, Amazon, and eBay, which help businesses leverage digital marketing strategies to drive sales.