Sign in with Google is an authentication feature that allows users to log into third-party websites and applications using their existing Google account credentials. This process leverages OAuth 2.0, a secure authorization framework, to grant the third-party service limited access to the user’s Google profile information without sharing the actual password. By using Sign in with Google, users benefit from simplified login processes, reduced password fatigue, and enhanced security, as Google applies its robust protection mechanisms such as two-factor authentication and suspicious activity monitoring. For developers, it streamlines user onboarding and can increase registration rates by reducing friction. However, it also requires careful handling of user data and compliance with privacy regulations.