Promote
You can lift up ads of your choice on top of the search results like if it was freshly placed.
The ad will display a ”promoted” sticker on the top left corner of the photo for 7 days.
The ad will stay on top of the search results until someone else places a new ad or promote his ad too.
Highlight
You can give your ad’s background some color to stand out from the other ads.
This feature does not lift up the ad in the search results and only offers a cosmetic change.