The main benefit of using a single sign-on (SSO) solution is enhanced user convenience and security. SSO allows users to access multiple applications and services with a single set of login credentials, eliminating the need to remember numerous passwords. This reduces the risk of password fatigue, where users may resort to weak passwords or reuse them across platforms. Additionally, SSO simplifies user management for IT departments, allowing for centralized control and easier implementation of security protocols such as two-factor authentication.