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# AppsReportingCampaign.BillingEvent

The billing event of the campaign at report time.

```
string AppsReportingCampaign.BillingEvent
```

## Discussion

This determines which report metrics are actionable for cost analysis: `TAPS` billing pairs with tap-based cost metrics, while `IMPRESSIONS` billing pairs with CPM-based ones.

### Example

```json
{
  "billingEvent": "TAPS"
}
```

See [`ReportingBillingEvent`](/documentation/Apple-Ads-Platform-API/ReportingBillingEvent) for additional context.

---

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