A new Moodle course site is hidden from students by default. Hidden sites will have (Hidden from students) appended to the title, and will appear as a gray link to instructors in the Course Overview on the Moodle Dashboard page. Students cannot see hidden sites or the grey text of the course site title.
Making a course site available to students
When your site is ready for students, you need to unhide it and notify them of the change.
Go to the course homepage.
Find the Administration block:
Click Show this course.
Click Show on the Confirm course visibility change page. The site is now visible to students that are enrolled or who were added manually to the site.