AI-generated Key Takeaways
- 
          DeliveryForecastSourceis an enumeration used to select forecasted traffic shapes for pacing line item delivery.
- 
          HISTORICALuses the line item's past traffic patterns for pacing.
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          FORECASTINGutilizes projected future traffic for pacing.
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          CUSTOM_PACING_CURVEallows for user-defined pacing curves.
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          UNKNOWNindicates that the actual value is not available in the requested API version.
Strategies for choosing forecasted traffic shapes to pace line items.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Enumeration | Description | 
|---|---|
| HISTORICAL | The line item's historical traffic shape will be used to pace line item delivery. | 
| FORECASTING | The line item's projected future traffic will be used to pace line item delivery. | 
| CUSTOM_PACING_CURVE | A user specified custom pacing curve will be used to pace line item delivery. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |