Keycloak is an open-source identity and access management solution designed for modern applications and services. It provides single sign-on (SSO), identity federation, and social login capabilities, allowing organizations to manage user authentication and authorization securely. Keycloak integrates with multiple protocols like OAuth2, OpenID Connect, and SAML, ensuring compatibility with various security standards. It offers features like multi-factor authentication (MFA), role-based access control (RBAC), and user management interfaces. Keycloak is highly customizable, making it suitable for both small applications and enterprise-level environments.