https://www.csoonline.com/article/2115776/sso-explained-how-single-sign-on-improves-security-and-the-user-experience.html#tk.rss_all
How single sign on (SSO) works: Definition, examples, and solutions | CSO Online
Single sign-on (SSO) is a centralized session and user authentication service in which one set of login credentials can be used to access multiple applications.