Validate rewarded ad views with server-side verification

Server-side verification (SSV) is another validation for rewarded ad views in your app. It's used in addition to the standard client-side callback.

Server-side verification validates each completed rewarded ad view. This ensures you're only rewarding users who actually finished watching the video in your app.

Each time a user finishes viewing a rewarded ad, AdMob uses the callback URL you provide to validate the view.

Learn more about SSV for Android, iOS, or Unity.

Set up and test server-side verification

Complete the following steps:

1. Sign in to your AdMob account at https://admob.google.com.
2. Click Apps in the sidebar.
3. Select the name of your app. If you can't find it in the list of recent apps, you can click View all apps to search a list of all of the apps you've added to AdMob.
4. Click Ad units in the sidebar.
5. For new ad units, follow the steps to create a rewarded ad unit. For existing ad units, click the name of the ad unit.
6. Click  Advanced settings. 
7. Click  beside Server-side verification.
8. Click Set up and verify callback URL beside server-side verification.
9. Complete the server-side verification settings. Enter your URL and any parameters you want to use to verify callback:
   • Callback URL: The full URL you want AdMob to send to you when a user has finished viewing a rewarded ad (for example, https://example.com/sample_ssv).
   • User ID (optional): This is used for testing only. The user ID is a unique identifier given to each user, which lets you know who to reward upon successful ad completion. To use, set the user_id parameter in the SDK.
   • Custom data (optional): This is used for testing only. Custom data is received in the callback after a user’s successful ad completion. For example, you can include a parameter to know which level the user is on. To use, set the custom_data parameter in the SDK.
10. Click Verify URL.
    Note: You must verify the URL before you can finish setting up SSV.
11. Click Use verified URL.
12. Click Save.

Troubleshoot SSV errors

• If the URL came back with an error, review the error message and ensure that you’ve followed the instructions for setting up SSV for Android, iOS, or Unity.