Delegate authentication to an external identity provider.
To give you an idea on what you will learn, i am listing some of the diagrams taken from the guide.
Experience showed us that users forget passwords, support teams reset accounts constantly, and every new application repeats the same hard work
Let a dedicated identity management system handle all user authentication.
Azure AD handles secure password storage, MFA, and threat detection automatically. Multiple applications can connect to the same Azure AD tenant, enabling seamless single sign-on across all of them.