The tutorial written by Sesethu Mhlana guides users through integrating Descope, a customer authentication, and identity management platform, into an Angular application to enhance security with passwordless authentication and role-based access control (RBAC). It explains setting up a Descope account, creating a project for authentication flow, and developing a starter Angular app to incorporate magic link authentication. This approach simplifies securing access by verifying user identities and controlling their permissions based on assigned roles. The guide further details setting up roles and permissions in Descope to distinguish between admin and guest users, ensuring only authorized users can perform specific actions like adding or deleting books in the app. By implementing Descope’s features, developers can streamline security management, protect data integrity, and configure user access efficiently within Angular applications.