The tutorial covers the importance of state management in software applications, specifically for web and mobile apps. It introduces MobX as a simple and scalable state management solution that can be used with React. The tutorial guides readers through building a shopping cart application using Symfony and React, leveraging MobX to manage the state of the application data. The application is structured into components such as Product and Cart, which are connected to the MobX store. The tutorial also covers how to use decorators from MobX to make the code more readable and maintainable. Throughout the tutorial, readers learn about the benefits of using MobX for state management, including its ability to optimize synchronizing application state with React components and provide a portable solution that can be used with other JavaScript frontend frameworks apart from React.