If you're a member of many different teams, the Activity Feed can help you keep track of any Teams you've been added to, class calls you may have missed or class mentions (class mentions are created when a teacher or student @tags your class name in a post so that everyone in the class is notified about the post) that have been posted to a Team you're a member of. Below is an explanation and example of what your Activity Feed may look like.
(If you can't see the image below, please download the PDF version of this article from the bottom of the page).