Security Assertion Markup Language (SAML) serves as a pivotal open standard using XML to facilitate the secure exchange of authentication and authorization data between Identity Providers (IdPs) and Service Providers (SPs) in web-based applications. Widely used for Single Sign-On (SSO) and federated identity management, SAML simplifies the login process by allowing users to access multiple applications with a single set of credentials, ultimately enhancing user experience and security by minimizing password-related vulnerabilities. The protocol, which has evolved from its initial 2001 release to the more robust SAML 2.0 in 2005, continues to adapt to emerging security challenges and technological advancements. SAML is distinguished from other protocols like OAuth by its focus on enterprise applications and federated identity scenarios, whereas OAuth is more suited for authorizing third-party access to user data. While understanding and implementing SAML can be complex, platforms like Descope offer no-code solutions to integrate SAML SSO, thus streamlining authentication processes and allowing developers to focus on core application functionalities.