One of the key philosophies of Agile software development is to have information radiators visible on the wall so that the progress of the team as well as what team currently is working on gets clearly visible to anybody who visits to the team area. That includes stakeholders, project managers, team or anybody from the organisation.
However, haven’t you observed that many times, as you look at the card-wall (Scrum Board), things are not very clear to you. Card wall may look like the mesh of user-stories with statuses in To Do, In Progress or Done. However some of the bigger questions are not clearly answered by just looking at user-stories.