When integrating a bidding partner that requires their SDK, the following symptoms indicate an improper integration: - The [Ads Activity report](https://support.google.com/admob/answer/10979428) shows significantly fewer ad requests to that partner than you expect. - The `a3p` parameter in any request after the first ad request is missing. > [!IMPORTANT] > **Key Point:** The first ad request may contain the `a3p` parameter even if you did not configure bidding. Follow this checklist to make sure your setup is correct: - In the AdMob UI: - Confirm that you have followed the specific partner's [integration guide](https://developers.google.com/admob/unity/choose-networks.md.txt) to configure third-party bidding demand. - Confirm that you have an ad unit mapping for each creative format. - In your app code: - [Update the Unity editor settings](https://developers.google.com/admob/unity/quick-start#set-up-app-id) with the same app ID that your ad unit mapping targets. - Make sure your ad unit IDs match those in the AdMob UI as they must match exactly. - [Initialize Google Mobile Ads Unity Plugin](https://developers.google.com/admob/unity/mediation#initialize) and verify that the adapter status is `READY` before loading an ad. - Use the latest version of the adapter and SDK binaries for the ad source you're trying to integrate with.