Update your app code to show ads

If you’ve already set up an app in AdMob and added an ad unit to it, the last step is to implement the ad unit in your app’s code. Follow the instructions in the Google Developers Get Started guide. You will need your app ID and ad unit ID during implementation.

• Google Developers Get Started guide: Android or iOS
   
• More information about implementing each ad format:
   
  • Banner ads: Android or iOS
  • Interstitial: Android or iOS
  • Native: Android or iOS
  • Rewarded video: Android or iOS
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• Find your app ID & ad unit ID to use during implementation