- Banner views via GADBannerViewMBS class.
- Full screen ad when application opens via GADAppOpenAdMBS class.
- Full screen ad when you transition from one part of the app to another, e.g. to a new level in a game. Transitional ad via GADInterstitialAdMBS class.
Please notice that if you ask your clients for $1 in-app purchase to remove ads, you may make more money from that customer than with ads. But ads are great for a free application with thousands of users of course.