What is the My Announcements module and how do I use it?

My Announcements
Announcements allow instructors to post public messages to the students in their course. The “My Announcements” module displays any Announcements that have been made by an instructor within the last seven days. Checking into your course on a daily basis and posting frequent announcements, helps to keep your students on track. Instructors can post reminders about due dates, clarify questions regarding assignments, and activities or to summarize overall course progress.