As the course author, you get in-app notifications when co-authors or reviewers tag you, respond to, or close your review comments.
You can find the in-app notifications under the notification bell in the top right corner of the editor.
Requests (co-authoring requests, invitations to the organization, email verification messages) are always pinned to the top and considered as unread until you accept or decline them.
Notifications about new comments and replies
Authors and co-authors are notified about new external review comments and replies.
The course author is notified via email when co-authors or reviewers tag you, respond to, or close your review comments.
You can change the email notification preferences under My Account > Settings.