| MediationAdapter | Adapter for third party ad networks. |
| MediationAdRequest | Information about the ad to fetch for a single publisher. |
| MediationBannerAdapter | Adapter for third party ad networks that support banner ads. |
| MediationBannerListener | Callback for an adapter to communicate back to the mediation library. |
| MediationInterstitialAdapter | Adapter for third party ad networks that support interstitial ads. |
| MediationInterstitialListener | Callback for an adapter to communicate back to the mediation library. |
| NetworkExtras | An empty interface for use by Google Mobile Ads mediation adapters. |