The article provides a comprehensive guide on customizing the backend of Strapi, a headless CMS built on the Koa framework, to create a store API with order confirmation capabilities. It details the process of setting up a Strapi project, creating content types for Products and Orders, and customizing controllers and routes to enable users to confirm orders. The customization involves defining a controller function to handle order confirmations and setting up a custom route for this purpose. The article also emphasizes the use of Strapi's entityService for CRUD operations and highlights the importance of ensuring that only authenticated users who created an order can confirm it. Additionally, it outlines the steps for setting up user authentication, managing permissions, and creating new entries in the Strapi admin panel. Overall, the guide illustrates how Strapi's extendable architecture allows for tailored functionality beyond its default capabilities.