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# SKStoreProductParameterAdNetworkSourceAppStoreIdentifier

The key that represents the App Store ID of the app that displays the ad.

```
let SKStoreProductParameterAdNetworkSourceAppStoreIdentifier: String
```

## Discussion

The value for this key is an <doc://com.apple.documentation/documentation/Foundation/NSNumber>. Provide the App Store item identifier of the app that’s displaying the ad.

During testing, if you’re using a development-signed build to display the ads and not an app from App Store, use `0` as the item identifier.

---

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