Single sign-on, usually written SSO, is a login system that lets someone use one set of credentials to reach several different platforms, instead of keeping a separate username and password for each. In practice it usually means staff log in with the same account they already use for their work computer or email, and that one login carries them into the other tools they need. For a training platform, this is a common requirement from larger clients. A company with three hundred employees does not want to create and manage three hundred separate logins for the learning system on top of every other system those people already use, so SSO lets the learning platform trust the company's existing login instead. It also reduces the number of passwords people have to remember, which is a quiet security gain, because the most dangerous passwords are the weak ones people choose when they have too many to track. When an enterprise or post-secondary client asks whether your platform "supports SSO," they are asking whether it can plug into the login system they already run.
Glossary entry