When you choose to make a step visible to participants, you are essentially publishing the step. This makes it easy to publish a course and continue to work on additional steps before making them available to participants. You can also easily drip course content as you desire, by scheduling steps in the future. Please see, Scheduling Step Content for more details.
To edit visibility settings, edit the course. Go to the step and scroll to the bottom. Toggle the visibility option to 'publish' and 'unpublish' the step. If there are any invisible (unpublished) steps created, participants will be unable to complete the course until those are made visible or deleted.
EDIT/SCHEDULE STEP VISIBILITY AREA