Subha Chanda, a freelance web developer, presents a comprehensive tutorial on integrating OAuth 2.0 into a React application, emphasizing its importance in enhancing user experience and security. OAuth 2.0, a framework for granting access to resources without sharing login credentials, allows users to sign in using their existing social network credentials, thus simplifying the authentication process. The tutorial outlines two methods for implementing OAuth 2.0 in React: a manual approach involving direct management of access tokens and a streamlined method using the Descope provider. Descope offers a no- or low-code solution that simplifies integration by managing tokens and providing additional features like multi-factor authentication, user management, and progressive profiling, all while allowing customization to maintain brand consistency. The tutorial also highlights the security challenges inherent in OAuth implementations, such as token hijacking and redirect URI misconfigurations, and suggests using established authentication services like Descope to mitigate these risks.