If you’d like to experiment which content goal is best for you, you can do so by navigating to your Settings > Paid Promotion.
If you have a single Team, you'll find Paid Promotion Under the Organization Header on the left. If you have multiple teams within an organization each team will have their own Page Promotion tab.
Create New Optimization Profiles
In the Paid Promotion Tab, you can select the default content test goal by using the relevant dropdowns. Your Link, Video, and Image content will have dropdown options that correlate to the optimization profiles relevant to them.
After you’ve selected your default profiles, don’t forget to hit the “save” button at the bottom of the page!
Curious about the different goals? Learn more about them here.