An Explanation Of SSO | Avast

Do you ever “log in with Google” or “log in with Facebook” to access an account that’s not either of those two? If so, you have used single sign-on (SSO), and you probably chose that option because it saved you from having to create and remember yet another password for yet another account. That’s precisely the point of SSO — it’s a remedy for password fatigue. 

Source:: Avast