The PRIMARY advantage of single sign-on (SSO) is that it will:

 Single sign-on (SSO) is a technology that allows users to access multiple applications or services with one set of credentials, such as a username and password. The primary advantage of SSO is that it increases the efficiency of access management, as it reduces the need for users to remember and enter multiple passwords for different applications or services. SSO also simplifies the user experience, as they can log in once and access multiple resources without having to switch between different windows or tabs. SSO can also improve the security of related applications, as it reduces the risk of password compromise or phishing attacks. However, SSO does not strengthen user passwords or support multiple authentication mechanisms by itself. It is a complementary technology that enhances the security and convenience of access management. References = CISM Review Manual, 16th Edition, page 991

The primary advantage of single sign-on (SSO) is that it increases the efficiency of access management. With SSO, users only need to remember one set of credentials to access all of their applications, rather than having to remember multiple usernames and passwords for each application. This simplifies the user experience and helps to reduce the amount of time spent managing access to multiple applications. Additionally, SSO can also increase the security of related applications, as users are not sharing the same credentials across multiple applications, and it can also support multiple authentication mechanisms, such as biometric authentication.