If you have installed the plugin in C2, you must do the same in your CocoonIO Project. For this steps sign in to your cocoon.io dashboard and select your project where you want to show AdMob ads.CocoonIO - Dashboard
Visit your plugin section for your project and install following “Custom” plugin provided by cranberrygame.
It seems that there is an issue in the Cordova AdMob plugin, so it doesn’t work with Canvas+ (WebView+ works though).
Issue was reported. I hope it gets fixed soon.