AI-generated Key Takeaways
- 
          ReportQuery.AdUnitView is a view for an ad unit report within the ReportService. 
- 
          It defines different ways to view ad units in a report: TOP_LEVEL, FLAT, and HIERARCHICAL. 
- 
          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
- 
               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. |