A lesson has four settings that control its availability to students.
Stop Lesson. Prevents the student from continuing or entering the lesson until a condition is met—submitting an assignment, passing a test, or paying off outstanding debts. Learn more: How to set up a stop lesson?
Promotional lesson. This lesson can be opened before a student begins the course—convenient for introductory material.
The lesson is always available. It's not subject to any stop lessons or opening schedule: you can take it at any time.
Draft. The lesson is visible to teachers and administrators, but hidden from students while you prepare the material.
Below is the URL field: the lesson address in the link. You can also delete a lesson there if it doesn't have any sublessons in the block.
Homework and tests are not configured here - they are located on the "Homework" tab.