A placement is a location in your app where ads are shown
Creating a placement
Basic Details
Key
Unique identifier for the placement. This will be used when requesting an ad. Eg: home_screen .
Pricing
Define pricing (CPM / CPC) for the placement. Different placements may command higher/lower prices due to their location, traffic etc.
Pricing can be overridden when creating an ad
For example, if the default pricing is based solely on impressions (CPM), but an advertiser wants to negotiate a deal including clicks (CPC).