An Ad Placement is a set of rules for a group of Ads. You use Ad Placements to break your site's Ad Inventory up into manageable groups. Ad Placements will help you keep your Ads organized and simplify the task of updating and managing your Ads.
Placements can target things such as pages and Zones. You can then target Ads to the Placement. This makes it so you can create a set of targeting rules and use them for multiple Ads. An example would be creating an Ad Placement called "Topbar - Front Page”. This Placement would be set to target the Topbar Zone and the <front> page. You could then target Ads that have paid extra to this Placement.
To create an Ad Placement, do the following:
Follow the below steps to modify a Placement. Your modifications will take effect immediately.
Placements can target Zones and Pages. By setting up Placement Targeting you can target a group of ads to a particular location within your site such as "Topbar - Front Page". Just create the Placement with a set of targeting rules and then target individual ads to the Placement.