Single Sign-On (SSO) is an authentication process that allows users to access multiple applications or services with a single set of credentials. This streamlined approach enhances user experience by eliminating the need to remember multiple usernames and passwords, thereby reducing the hassle of managing various accounts. SSO works by authenticating the user once through a central Identity Provider (IdP), which then issues a security token that grants access to different services. This not only simplifies the login process but also improves security by minimizing the risk of weak or duplicated passwords across platforms.