When overseeing a team it is useful for project leaders/managers to know whether team members who have been assigned a task have logged in and seen the task. That way the leader/manager knows whether or not they have to follow up with the team member to ensure that they have read tasks that have been assigned to them. Without this feature, team-members who want to shirk responsibility for a task always have the 'I didn't see that notification' excuse.

This could be accomplished by adding a 'seen by' feature which would be similar to Facebook group messages. Essentially, when each person who has been assigned to a task logs in and views the item in question, text appears below the task saying 'Seen by Joe Bloggs, Jack Smith, etc'.