passport-google-oauth2 is a Node.js library that provides Google OAuth 2.0 authentication strategy for Passport, enabling developers to easily integrate Google sign-in functionality into their web applications. This project is designed for Node.js developers building applications with Express or similar frameworks who want to allow users to authenticate using their Google accounts. The library handles the OAuth 2.0 flow, provides access to user profile information, and integrates seamlessly with Passport's authentication middleware.