Paid placements above other listings. The price and duration are shown before you pay.
Promoted listings appear above the others in search results:
Choose Promote in the ⋯ menu of an active listing in My listings to see the price and duration of each option before you pay. If promotion isn’t on sale yet, it says “coming soon”.
In the Android app nothing is sold: Google Play allows only its own billing for digital purchases, so promotion will be available on the website.