<!--
{
  "availability" : [

  ],
  "documentType" : "symbol",
  "framework" : "SKAdNetworkforWebAds",
  "identifier" : "/documentation/SKAdNetworkforWebAds/AdImpressionRequest",
  "metadataVersion" : "0.1.0",
  "role" : "Object",
  "symbol" : {
    "kind" : "Object",
    "modules" : [
      "SKAdNetwork for Web Ads"
    ],
    "preciseIdentifier" : "data:skadnetwork:AdImpressionRequest"
  },
  "title" : "AdImpressionRequest"
}
-->

# AdImpressionRequest

The request body that devices send to fetch the web ad impression from the ad network’s server.

```
object AdImpressionRequest
```

## Discussion

The device generates the [`AdImpressionRequest`](/documentation/SKAdNetworkforWebAds/AdImpressionRequest) and sends it in the body of a [`Get a Signed Web Ad Impression Payload`](/documentation/SKAdNetworkforWebAds/Get-a-signed-SKAdNetwork-ad-payload-for-a-web-ad.) request. The device uses the value from the `attributionSourceNonce` in a web ad link for the `source_nonce` value in this request. The ad network looks up the fully signed web ad impression using the `source_nonce` value, which it creates when it serves the attributable ad link.

> Important:
> The `attributionSourceNonce` in a web ad, the `source_nonce` in this request, and the `nonce` in a corresponding ``doc://com.apple.skadnetworkforwebads/documentation/SKAdNetworkforWebAds/AdImpressionResponse`` all represent the same UUID, but the encoding varies.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)