What is OATH2?

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 by orchestrating an approval interaction between the resource owner and the HTTP service, or by allowing the third-party application to obtain access on its own behalf. It is commonly used for granting websites or applications access to your information on other websites without giving them your password (e.g., 'Sign in with Google').