Single logout (SLO) is a crucial counterpart to single sign-on (SSO), offering a streamlined process for users to log out of multiple applications simultaneously after using a single login credential. While SSO has been widely adopted for its convenience, SLO lags behind, often due to challenges in implementation and adoption by identity providers (IdPs) and service providers, which can lead to security vulnerabilities. SLO operates by leveraging the existing SSO architecture, using protocols like Security Assertion Markup Language (SAML) to manage user sessions across applications. It enhances security by ensuring that logging out from one application terminates all active sessions associated with the same identity. Best practices for implementing SLO include managing idle sessions, enforcing short session lifetimes, and incorporating multi-factor authentication to bolster security. However, widespread adoption faces hurdles such as lack of support from some IdPs and service providers, and technical challenges related to browser cookie policies. As cybersecurity becomes increasingly prioritized, the adoption of SLO is expected to grow, driven by regulatory requirements and organizational focus on security.