Moodle has a feature that automatically links to activities when those activities are named elsewhere in the course. This is best to use when wanting to link to activities as this type of linking will not break when you import your course into a future term. 

This feature is normally on by default but continue to learn how to turn it on and off:

1. Click on the More tab at the top of your course and select Filters

2. Scroll down to find the Activity names auto-linking and change from On by clicking on the drop-down menu from the arrow. Switching this to off will remove auto-linking for all pages in the course.

3. Scroll down and click on Save Changes, this will return you back to your course.

4. When you add a new activity or resource, and include any link, the link will show up in blue and when clicked on will open up.