Mark messages as read
If you select to mark all messages for all chats and group discussions as read, the blue badge on the Chats tab is removed when all of the messages are marked as read. If you chose to mark some chats and group discussions messages as read, the badge reflects the total number of messages that are unread. On the chats list, the blue box that lists the number of unread messages from each contact is removed when the messages are marked as read.