AdMob Ads to Earn Money
These are the small things you can make a lot of money with mobile apps. All you need to do is create an awesome app and publish it on Google Play or App Store. You can pay per download to your app or earn money from AdMob ads.
You have to create an AdMob account and paste ads code in your Android apps, after which its ads appear on your android apps. and publish it on Google Play or App Store. You can earn money from AdMob ads.