In the concluding part of a series on building an eCommerce website using Strapi, Jekyll, Tailwind CSS, and Snipcart, the focus is on implementing cart functionality with Snipcart. After setting up the backend and frontend in earlier parts, and creating layouts and product views, this section guides users through registering for a Snipcart account to obtain API keys necessary for integration. The integration involves updating the HTML of the website with Snipcart's scripts and modifying the "Add to cart" button in the product layout to enable cart functionality. This allows users to add various products to a cart that updates automatically. The completed project provides links to both frontend and backend repositories for users to access the final source code.