02. Create a new app for monetization - myflashlab/Admob-ANE GitHub Wiki

Once you have your Admob account ready, You should create a new application in there based on your Air App package/bundle name. To do that, click on the Monetize tab at the top of your console as you can see below.

If you are releasing your app to both, Android and iOS platforms, you will need to create two applications in your Admob console. because as you can see in the screenshot above, Admob requires you to select the platform where the ads are supposed to be shown.

As soon as you hit the blue Add app button, Your App ID will be generated for you as it's seen in the screenshot below. Write down this String now, because you will need it later when you are initializing your Admob ANE in your app.

When creating a new Admob app, you will be asked to create at least one ad format. you can do it now, or later. but it's a good idea to do it right now because on the third step, you will be able to link your Admob app to the new Firebase Analytics system. If you wish to add more ad formats, you can do that later as explained in Step 3