Single Sign-On, or SSO, is a convenient authentication process that allows users to access multiple applications or websites with just one set of login credentials. Instead of remembering different usernames and passwords for each service, users can log in once and gain access to all connected platforms. This not only saves time but also enhances security by reducing the chances of forgotten passwords. With SSO, when you log into one application, it automatically authenticates you for others linked to the same account. This means you can easily switch between services like Google, Facebook, or Microsoft without needing to log in again, streamlining your online experience.