The primary function of an e-commerce platform is to facilitate online buying and selling of products or services. These platforms provide the necessary tools for merchants to create online stores, manage inventory, process payments, and track orders. They often include features like customer relationship management (CRM), marketing integrations, and analytics. E-commerce platforms enable businesses to reach a wider audience and operate 24/7, contributing to increased sales opportunities. Examples of popular e-commerce platforms include Shopify, Magento, and WooCommerce.