Single Sign-On (SSO) is a feature that allows a user to authenticate once and access multiple applications or services without having to re-enter their credentials. SSO improves the user experience and reduces the password management burden for both users and administrators. SSO is a common feature of Identity as a Service (IDaaS) solutions, which are cloud-based services that provide identity and access management capabilities to organizations. IDaaS solutions typically support various SSO protocols and standards, such as Security Assertion Markup Language (SAML), OpenID Connect (OIDC), OAuth, and Kerberos, to enable seamless and secure integration with different applications and services, both on-premises and in the cloud.