The acronym SSO stands for Single Sign-On, a user authentication process that allows individuals to access multiple applications with one set of credentials. SSO enhances user convenience by eliminating the need to remember multiple usernames and passwords, improving user experience. It also enhances security by reducing the number of login credentials that can be compromised. Furthermore, SSO simplifies management for IT departments, as it centralizes access control, enabling efficient user provisioning and revocation while supporting compliance with security policies.