AI-generated Key Takeaways
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ReportQuery.AdUnitView is a view for an ad unit report within the ReportService.
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It defines different ways to view ad units in a report: TOP_LEVEL, FLAT, and HIERARCHICAL.
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TOP_LEVEL shows only top-level ad units with descendant metrics, FLAT shows all ad units without descendant metrics, and HIERARCHICAL uses the ad unit hierarchy with specific columns for each level.
 
A view for an ad unit report.
- Namespace
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https://www.google.com/apis/ads/publisher/v202505 
| Enumeration | Description | 
|---|---|
                        TOP_LEVEL
                      | 
                     Only the top level ad units. Metrics include events for their descendants that are not filtered out. | 
                        FLAT
                      | 
                     All the ad units. Metrics do not include events for the descendants. | 
                        HIERARCHICAL
                      | 
                     
Use the ad unit hierarchy. There will be as many ad unit columns as
levels of ad units in the generated report:
 Metrics do not include events for the descendants.  |