Admob is Google’s advertising platform for mobile apps. It allows app developers to promote their app through in-app advertising, as well as monetize their apps by showing ads in apps.
Get AdMob ad units
First, login to Admob here, then select Monetize and click [ +MONETIZE NEW APP ]
Your application was published on store? If true select Search FOR YOUR APP else select ADD YOUR APP MANUALLY.
In this document select Add your app manually. Input App name, select Platform and click [ ADD APP ]
Next, select Ad format, change option if you want, input Ad unit name and click [ SAVE ]
Final, you will receive an Ad Unit ID like ca-app-pub-xxxxxx/xxx
Just configure the Ad Unit you get in the Stionic menu on the WordPress Dashboard. The app then synchronizes and displays the ads when viewing the article.