Depends on how many people download the app and see the ads, they probably will pay you on a per-view basis, so probably like $0.25 or so per view (depending on who's paying you and how popular your app is)
You can get apps in Google Play store.
You can visit the Google app store to know that. Google apps that are free do not charge money for them.
aircell pocket apps store. search it on Google
aircell pocket apps store. search it on google
You go to the play store. To get to the play store just type it in google.
You might not have the Amazon App Store app that you may have downloaded your apps from. You will have to get that particular app from Amazon directly, as it is not available on the Google Play Store. Any updates on apps you got from the Amazon App Store will only come from there. Or, if the apps you are looking for are already in the Google Play Store, you may just start over and get the same apps from there instead.
As of June 25, 2014 the Google Play Store has 1,270,873 apps available to download. The App Store is just below that number at about 1,200,000 apps. The Windows Store lags behind at only about 400,000 apps.
The Google apps email address is for you to access the app store. It is not an actual email address.
An example of a good platform for downloading apps is Google Play Store and iTunes.
The Google Play Store and the Amazon Appstore carry about the same amount and kind of apps as Apple's App Store.
You can get apps in the Google Play Store. Keep in mind though that not all apps are tablet-optimized. But, with over 700,000 apps out there, there should be plenty of choices.
You cannot make Google play automatically update apps from a third party. Although they may appear in your downloaded apps list, they will need to be manually updated.