The tutorial provides a comprehensive guide on building a WebSocket server using Rust, highlighting its benefits such as efficient memory management and handling a large number of connections without compromising speed. The guide explains how to set up a basic message relay service allowing clients to connect, register, and receive real-time messages via WebSockets. It covers the necessary steps to create a new Rust project, define data structures, and set up routes for client registration, connection, and message relaying. The tutorial also details the implementation of WebSocket handling using the warp and tokio libraries, showcasing how to upgrade HTTP connections to WebSockets and manage client communication efficiently. The tutorial concludes by addressing the optimization of data access patterns using RwLock for improved application performance, and it emphasizes the importance of understanding asynchronous streams and concurrency in Rust for effective WebSocket server development.