You have successfully built and deployed a full-blown Jamstack app with a custom backend using Strapi and Netlify Functions. In this tutorial series, you created serverless functions to read from your backend asynchronously, then display data from your backend in an HTML frontend. You also wrote JavaScript code to save reactions to your backend and update the frontend. This demonstrates the power of the Jamstack, which allows you to configure your entire backend with no code at all, and deploy a fully functional frontend with fewer than 150 lines of code. The tutorial covers topics such as using Netlify Functions, creating serverless functions, writing an app frontend, and handling user interactions.