Announcements are used to communicate course logistics to the class. Once an Announcement is created, Canvas will notify students according to their preferred Notification Preferences.
By default, Announcements in Canvas allow students to reply/comment. If you do not wish students to comment on Announcements, it will be necessary to disable comments within Course settings.
To learn more about Announcements, feel free to view the Announcement Overview Video and the Announcement Tutorials on this page.