What the Heck is Facebook Graph API v2.1?
On August 7, 2014, Facebook updated some tools for developers to use when accessing certain features of Facebook. In addition, Facebook updated some policies that relate to how you use Facebook to build your audience and attract “likes” and followers. Although the announcement and the updates are pretty important for app developers who use Facebook, bloggers and other Facebook users who use Facebook login and other functions should pay attention to these changes as well.