OAuth
OAuth is an open standard authorization framework that enables third-party applications to obtain limited access to a user's resources on a service, such as a web server, without exposing the user's credentials. It works by delegating user authentication to the service that hosts the user account and authorizing third-party applications to access the account. This is commonly used for social logins, API access, and secure data sharing between applications.
Developers should learn and use OAuth when building applications that need to securely access user data from external services, such as integrating with social media platforms (e.g., Facebook, Google), or when creating APIs that require user authorization. It is essential for implementing single sign-on (SSO) systems, enhancing security by avoiding password sharing, and complying with modern authentication standards in web and mobile apps.