For any new ad you may edit the headline, ad copy, and choose from a number of images (pro tip: exterior images perform better). To do so, follow these steps.
Note: you cannot edit an ad that is already published and running. Edit is available for new ad purchases only.
Click on Edit
Choose Your Headline
Edit Ad Copy (if you wish, default ad copy performs very well).
Choose the Best Picture
Click Save
Complete your purchase!