CODE EXAMPLE FOR JAVASCRIPT

ab mob react native expo

 import { AdMobBanner,} from 'expo-ads-admob';

 <AdMobBanner
  bannerSize="banner"
  adUnitID="ca-app-pub-yourKeyHere" 
  servePersonalizedAds={false}
  onDidFailToReceiveAdWithError={this.bannerError} />