What is OAuth 2?

OAuth 2.0 is an authorization framework that enables a third-party application to obtain limited access to an HTTP service, either on behalf of a resource owner or by allowing the third-party application to obtain access on its own behalf. It is commonly used for applications to access resources like user profiles, photos, and contacts stored on other platforms without requiring the user to share their credentials directly with the application. This is done by granting the application a token that has a specific scope.