Sign in to your AdMob account at https://apps.admob.com.
Click Apps in the sidebar.
Click Add app to add a new app.
Choose ‘NO’. Have you published your app on Google Play or the App Store?
Choose platform and enter the app name. Once you have added new app you will get App ID.
Click Add ad unit.
Click Select for the Banner.
Enter a name for this ad unit. You can add any name for example ‘banner1’.
Click Create ad unit. Once you have created ad unit you will get Banner Ad Unit ID.
Click Add another ad unit.
Click Select for the Interstitial.
Enter a name for this ad unit. You can add any name for example ‘gameover’.
Click Create ad unit. Once you have created ad unit you will get Interstitial Ad Unit ID.
Click done. We need all 3 IDs (App ID, Banner ID and Intersitital ID).
