Single Sign-On (SSO) is a robust authentication solution that enhances security, enhances user experience, and eases IT administration. By allowing users to sign in once and access multiple applications, SSO minimizes password fatigue and lessens the attack surface for credential-based attacks like phishing and brute-force attacks. Organizations enjoy streamlined identity management, improved compliance, and lower IT support expenses. But if an SSO account is hacked, it can result in large-scale security compromises. To counter this, companies should have Multi-Factor Authentication (MFA), apply least privilege access, and have continuous security monitoring to identify and block unauthorized access.