OpenID Connect (OIDC) is an authentication protocol built upon the OAuth 2.0 authorization framework. This means that OIDC allows applications to verify a user's identity and obtain profile information securely, using JSON Web Tokens (JWTs) for data transfer. OIDC provides features like single sign-on (SSO), API-centricity, and ease of implementation, making it ideal for modern mobile and web applications. The document outlines the steps involved in a typical OIDC authorization flow, starting with a user initiating login and ending with the client verifying the user's identity and granting access to its resources.