The tutorial outlines the process of building a full-stack application using Nx to manage both frontend and backend within a single repository, focusing on creating a GraphQL API with Apollo Server and a React application to consume it. It details the steps for setting up an Nx workspace, creating a GraphQL schema, using GraphQL Codegen for type generation, and developing a simple API to manage Lego sets. The guide emphasizes maintaining a modulith structure for monorepos to ensure consistent schema usage across projects. It also covers the integration of Apollo Client in a React app, demonstrating how to create and organize React components and libraries to facilitate communication with the backend. The tutorial provides insights on optimizing the development workflow with Nx, including setting up caching and task dependencies to ensure efficient and error-free code generation.