The standard that lets one sign-in unlock many apps, by passing a signed confirmation of who you are.
Like a stamped visitor pass issued at the front gate: every office inside accepts it without asking you to prove yourself again.
Password Manager supports SSO for apps that need it, and Cloud covers the sign-in side of your workspace.
Do I need to understand SAML?
No. You only need to know whether the app supports sign-in with your work account.
Every WILDCARD card exists to solve one named problem. Find yours.