Hello to all,
The App Builder's AdMob plugin allow us to shown banners and interstitial ads inside our Apache Cordova builded applications. You need an account in the Google AdMob website and create your own Ads IDs in order to provide it to the plugin. This plugin uses behind the scene the AdMob Pro plugin for Apache Cordova.
This plugin is included by default with the App Builder's installation along with an AdMob application sample. Take a look at that application sample in order to view how to use this plugin.
Hope that can be useful!