The social network also announced in the same post on its developer blog that developers can now upload screenshots of their open graph usage directly within the submission process, and that its WordPress plugin has been updated.
Here are more details from the blog post:
Apps and games can now create and manage groups via the graph application-programming interface to help people connect and share their experiences. To date, many gamers create their own groups to connect with friends and share tips and tricks about the games they play together. Now games can seamlessly create and invite players who may not know each other outside of the game to join groups around clans or other joint activities. Groups can facilitate community interaction and drive deeper connections among players.
To ensure a high-quality experience for users, we’re making this feature available as a beta to all apps and games listed in app center, and will continue to iterate over time. You can get started now by reading our concepts and reference documentation.