Activity Feed is a unit homepage widget that provides a central location for instructors to post messages and assignments. You can also provide links to unit materials and external resources. This gives learners the ability to quickly access links to important materials, comment on messages made by instructors and classmates, and upload files to assignment posts. Instructors can use simple HTML markup to format message posts and assignment instructions.
Watch an overview of the Activity Feed
https://www.youtube.com/watch?v=smZ_hOSWxX0&feature=emb_title