When first created, your course is in a pending state. Once you've tested your course, you'll want to publish it for the world to see!
A course that's in a pending state can be published as follows:
Your course will now be publicly accessible, or accessible by members of your organization if it is private.
Future changes to your course repository's default branch will automatically update the course. Instead of making changes directly on the default branch, we recommend that you make changes in a new branch and then create a pull request. Creating the pull request will create a draft version of the course for you to test. You will "publish" draft versions by merging the pull request.
See Making changes for more information.