Create empty game object and attach AdMobBannerInterstitial script. It will cause a scene with this gam-object, show interstitial ads in few seconds after scene is loaded.
Create empty game object and attach AdMobBanner script. You can also fill banner settings as on the screenshot bellow. As the resulting scene with this game object will contain banner ad according to the script settings.
The example can be founded on the NoCodingExample example scene.