Privileged Single Sign On is a type of SSO
Authentication focused mainly on privileged users who require access to administrative or super user accounts to connect to any resource or application. The PAM agent stores credentials of such administrative accounts centrally in the vault, and whenever the user tries to access any resource, it passes on those credentials directly from the vault to the resource and validates their identity, enabling a secure way for the privileged user to access a wide variety of resources including Windows Machines, Databases, Routers, Switches, Application and more depending on the privileges they have been granted.