This tutorial provides a comprehensive guide to building a RESTful API in PHP using Laravel Sanctum. It covers the installation and setup of Laravel Sanctum, creating an API with endpoints for user registration, login, and fetching the currently authenticated user. The tutorial emphasizes the benefits of using Laravel Sanctum over Laravel Passport, highlighting its simplicity, lightweight nature, and compatibility with Single Page Applications and mobile applications. The author also provides instructions on testing the API using Insomnia and offers additional resources for further learning. Throughout the tutorial, the author maintains a neutral tone, providing clear explanations and concise code snippets to facilitate understanding of the concepts and implementation details.