Ads are an effective and easy way to earn revenue from your apps. Google AdMob is a smart monetization platform for apps that helps you to maximize revenue from ads and in-app purchases. More than 1 million apps use Google AdMob to generate a reliable revenue stream, with more than $1 billion paid to developers.
All you need to do is sign up for Google AdMob, and then use the Google Mobile Ads SDK to place ads in your app with just a few lines of code. You get paid quickly in your local currency (where available), with no wire fees charged by Google AdMob. Also, Google AdMob’s integration with Google Play services pushes automatic performance improvements to Android apps without additional SDK changes.
How does it work?
AdMob helps you monetize your mobile app through in-app advertising. Ads can be displayed as banner, interstitial, video, or native ads—which are seamlessly added to platform native UI components.
Before you can display ads within your app, you’ll need to create an AdMob account and activate one or more ad unit IDs. This is a unique identifier for the places in your app where ads are displayed.
AdMob uses the Google Mobile Ads SDK which helps app developers gain insights about their users and maximize ad revenue. To do so, the default integration of the Mobile Ads SDK collects information such as device information and publisher-provided location information.
So I think this article will help you very much. So but be serious with it dont cheat and will earn more than from youtube but one thing remember dont spam it always update your apps and make your app user friendly so most of android user download them and you earn more and more.