Studies have shown that website registration forms are inefficient as many people provide false data, forget their login information for the site or simply decline to register in the first place. For this reason, social login is generally not used for strict, highly secure applications such as those in banking or health.
While social login can be extended to corporate websites, the majority of social networks and consumer-based identity providers allow self-asserted identities. Sites using the social login in this manner typically offer social features such as commenting, sharing, reactions and gamification. OAuth is a secure authorization protocol which is commonly used in conjunction with authentication to grant 3rd party applications a " session token" allowing them to make API calls to providers on the user's behalf. For consumer websites that offer social functionality to users, social login is often implemented using the OAuth standard. Social login can be implemented strictly as an authentication system using standards such as OpenID or SAML. Many sites which offer social login also offer more traditional online registration for those who either desire it or who do not have an account with a compatible social networking service (and therefore would be precluded from creating an account with the website). This, in turn, negates the need for the end user to remember login information for multiple electronic commerce and other websites while providing site owners with uniform demographic information as provided by the social networking service. By selecting the desired social networking service, the user simply uses his or her login for that service to sign on to the website. Social login links accounts from one or more social networking services to a website, typically using either a plug-in or a widget.
It is designed to simplify logins for end users as well as provide more and more reliable demographic information to web developers. Social login is a form of single sign-on using existing information from a social networking service such as Facebook, Twitter or Google, to login to a third party website instead of creating a new login account specifically for that website.
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