Starting from Android SDK 7.2.0 and iOS SDK 10.0.0 the App Builder supports a plugin infrastructure for display advertising (banners & interstitials).
Upon creating an app or a new version, the default plugin of Google Ad Manager (formerly known as DFP) will be added automatically to the app. Ads will no longer display without this or a new advertising plugin added to the build.
Plugin Name: DFP Advertisement Plugin
To learn how to configure in-line banners and fixed banners/interstitials in the screen-level please refer to the following documents: