After you've 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 for Android or iOS. You'll need your app ID and ad unit ID during implementation.
More information about implementing each ad format:
- Banner ads: Android or iOS
- Interstitial: Android or iOS
- Native: Android or iOS
- Rewarded: Android or iOS