What is meant by social login?
Social login is a single sign-on (SSO) technology that allows users to authenticate themselves on various applications and sites by connecting through a social media site rather than typing a separate ID and password on each website.
Why use social login?
Social login allows users to authenticate in a website or app without needing to create another password for this new account, or having to remember this password next time they return. The process relies on the credentials from a social networking service such as Facebook, Google, Twitter or an Apple account.