|Message Location||Within Canvas course page||Within Canvas|
|Notifications||ASAP, by default||ASAP, by default|
|Can the whole class see the message?||Yes, if you set it that way||Yes, if you set it that way|
|Can be deleted?||Yes (can't retract email notification)||Only from your view|
|Rich Content Editor||Yes||No|
|Can students respond?||Yes/No - instructor can restrict students from responding||Yes|
|Multiple Attachments||No, but can embed multiple downloadable files||Yes|
|Draft mode||Yes - delay posting (can edit up until the post date and time)||No|
To create an announcement, follow the steps in Canvas's How do I make an Announcement in a course? guide.
To send a message to your students, see How do I send a message in Conversations?