If you are an instructor for a course, you can publish your course in the Course Home Page sidebar or from the Course Setup Checklist.

Step 1: Open Course

In Global Navigation, click the Courses link [1], then click the name of the course [2].

Step 2: Publish Course

In the Sidebar, click the Publish button.

Step 3: View Confirmation

A message will appear at the top of your screen confirming the publishing of your course.

Note on How to Unpublish Your Course:

If you need to unpublish your course, click the Unpublish button in the sidebar.

Once your course contains student submissions, you can no longer unpublish your course.

Resource:

https://community.canvaslms.com/docs/DOC-13030-415257126