(ask) monetize with Admob, Airpush, Adience

Don’t use admob, it’s scam and only gives you cents.

Try using Leadbolt Ads, it gives you more (about > 3 x) than admob.

and you can maximize your revenue by using 2 or 3 ad networks (in case the main ad network failed to return ads).
Airpush is good, but they only give low fill rate ads return. You also can try mobclix.