Facebook Login Overview

 Facebook Login is a fast and convenient way for people to create accounts and log into your app across multiple platforms. It's available on iOS, Android, Web, desktop apps and devices such as Smart TVs and Internet of Things objects. Facebook Login enables two scenarios, authentication and asking for permissions to access people's data. You can use Facebook Login simply for authentication or for both authentication and data access.

Use Cases

Facebook Login is used to enable the following experiences:

• Account Creation
  Facebook Login lets people quickly and easily create an account in your app without having to set (and likely later forget) a password. This simple and convenient experience leads to higher conversion. Once someone has created an account on one platform, they can log into your app—often with a single click—on all your other platforms. A validated email address means you're able to reach that person to re-engage them at a later date.
• Personalization
  Personalized experiences are more engaging and lead to higher retention. Facebook Login lets you access information which would be complex or arduous to collect via your own registration form. Even just importing someone's profile picture from Facebook gives them a stronger sense of connection with your app.  

  Success Stories

  Developers who have implemented Facebook Login in their apps have seen dramatic increases in logins, higher levels of engagement, and continuing increases in the number of people using Facebook Login. For details, see Success Stories.

  For example, Skyscanner, an app for finding flights, hotels, and car rentals, has experienced a 100% increase in the number of people using Facebook Login to access the app.