The guide explores the integration of GraphQL in Rust using the Juniper library, focusing on creating a backend web service that persists data to a Postgres database. It provides a step-by-step approach to setting up a project with Cargo, configuring necessary dependencies, and creating a web server using the Warp framework. The tutorial details the process of defining GraphQL schemas, setting up HTTP routes for handling GraphQL requests, and creating a database connection with tokio-postgres. It also covers implementing GraphQL mutations and queries to manage customer data, demonstrating how to register, update, delete, and query customers in the database. The guide emphasizes the ease of working with GraphQL in Rust due to its powerful macro support and highlights the potential for further development by adding features like authentication and custom error handling. Additionally, it suggests using tools like LogRocket to monitor and debug GraphQL requests in production environments.