Beginning last week, July 11th, Facebook has added a new setting to their groups with the addition of the ‘who’s seen each post’ feature. Facebook groups offer a place to connect and share information with specific sets of people. The new feature will help their users stay updated on their fellow group members’ activity. For example, when you post a time and date to meet up for a movie, you can see who has seen the posting and who has not.
Here is the official announcement from Facebook.