If enabled, activity completion conditions may be set in the activity settings and/or course completion conditions may be set. 

Follow the steps below:

1. Navigate to the course, Admin Dashboard > Course management > View All Courses

2. Find the course and click View Course

3. On top right hand side of the screen click the cog icon and then click Edit Settings  

4. Scroll down to Completion tracking and click Yes

5. Click Save and display 

Navigate back to "Setting up Course Completion"

-VS Version 3.5