Keycloak is an open source identity and access management solution that enables DevOps teams to manage user authentication and authorization in their environments. It provides a centralized platform for managing user identities, groups, and access control. It utilizes a combination of token-based authentication, role-based access control and other security features to provide a secure platform for user authentication and authorization. Keycloak simplifies the process of setting up and managing user authentication and authorization for applications and services, allowing DevOps teams to quickly set up and manage user access.