<br />

When an ad fails to load, a failure callback is called which provides a
`LoadAdError` object.

For any ad format, if the ad fails to load, the following callback is called:

```c#
public void OnAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
```

The following code snippet retrieves error information when an ad fails to load:

```c#
public void OnAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
{
    LoadAdError loadAdError = args.LoadAdError;

    // Gets the domain from which the error came.
    string domain = loadAdError.GetDomain();

    // Gets the error code. See
    // https://developers.google.com/ad-manager/mobile-ads-sdk/android/reference/com/google/android/gms/ads/AdRequest
    // and https://developers.google.com/ad-manager/mobile-ads-sdk/ios/api/reference/Enums/GADErrorCode
    // for a list of possible codes.
    int code = loadAdError.GetCode();

   // Gets an error message.
   // For example "Account not approved yet". See
   // https://support.google.com/admob/answer/9905175 for explanations of
   // common errors.
   string message = loadAdError.GetMessage();

   // Gets the cause of the error, if available.
   AdError underlyingError = loadAdError.GetCause();

   // All of this information is available via the error's toString() method.
   Debug.Log("Load error string: " + loadAdError.ToString());

   // Get response information, which may include results of mediation requests.
   ResponseInfo responseInfo = loadAdError.GetResponseInfo();
   Debug.Log("Response info: " + responseInfo.ToString());
}
```

This information can be used to more accurately determine what caused the ad
load to fail. In particular, for errors under the domain `com.google.admob` on
iOS and `com.google.android.gms.ads` on Android, the `GetMessage()` can be
looked up in [this help center
article](https://support.google.com/admob/answer/9905175) for a more detailed
explanation and possible actions that can be taken to resolve the issue.