The Notifications Dashboard consists of four modules that advise both students and instructors of What's New, Needs Attention, To Do, and Alerts. This allows the instructor to notify users of changes and events in their Course. Such changes and events can include when a test is deployed, when a grade has been posted, or when an assignment is due.
If you put your mobile number in your personal information, you can even get announcements via SMS or Text-Voice communications. If you use Bb's Mobile Learn you will get all of this information their also if you flag it to go "mobile'.
Reprinted from Bb Community Course