This tutorial guides the reader through building a single-page application (SPA) using Symfony as the backend and React for the frontend logic. The application fetches data from APIs, including users and posts. The reader learns how to combine Symfony and React using Webpack Encore. Key points include setting up the Symfony project, configuring Webpack Encore, creating reusable components in React, and rendering these components within a navigation bar. Throughout the tutorial, the reader is encouraged to explore the source code and add more features to their application.