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# SKStoreProductParameterAdNetworkCampaignIdentifier

The key that represents the advertising network’s campaign.

```
let SKStoreProductParameterAdNetworkCampaignIdentifier: String
```

## Discussion

The value for this key is an <doc://com.apple.documentation/documentation/Foundation/NSNumber>. Ad networks determine their own campaign identifiers, which must be an integer `>=1` and `<=100`.

Use [`SKStoreProductParameterAdNetworkSourceIdentifier`](/documentation/StoreKit/SKStoreProductParameterAdNetworkSourceIdentifier) instead of this value to generate version 4 and later signatures.

---

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