After posting a message to a Facebook Group, you may be wondering who has read the post. Facebook members will soon be able to see exactly who has viewed each update posted to a Group. Below each post, you will see a post that says “Seen by” and it is followed by a number. Users will be able to hover over the text to see who has read each message and when they read it. The feature is called “read receipts” and it works on mobile devices as well. Facebook added read receipts into the mobile application “Facebook Messenger” in early May as well. The feature is in both one-on-one messages and in group chats.