Please allow up to 3 hours for ads to start displaying correctly before contacting Google Ad Manager (formerly DFP) support. If it has been longer than 3 hours, you can reach Google support here: https://support.google.com/dfp_premium/?hl=en#topic=28132&contact=1
Follow these instructions to enter the code for a mobile catfish ad. This ad will appear at the bottom of the player page when viewed on a mobile device. If the browser window on a desktop or tablet is too small to display the leaderboard, the mobile banner will display instead.