Social sign-in: Facebook, Twitter and LinkedIn
From Social login @ wikipedia.org:
Social login, also known as social sign-in, is a form of single sign-on using existing login information from a social networking service such as Facebook or Twitter to sign into a third party website in lieu of creating a new login account specifically for that website. It is designed to simplify logins for end users as well as provide more and more reliable demographic information to web developers.
In reality, it's often a tradeoff between rich profile information and streamlined registrations.
According to research from Gigya [.pdf], web users who log into 3rd party sites with Facebookâs Graph API spend 50% more time on those sites, and view twice as many pages. Facebook is also most often used as a social login:
Facebook however, provides the fewest data fields by default:
Image source: What Can You Learn from Social Sign-On? [GRAPHIC] @ http://blog.eloqua.com/: