Dimensions by which the breakdown metrics are grouped by.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/services/benchmarks_service.proto)

| Fields ||
|---|---|
| ## `dates` | `https://developers.google.com/google-ads/api/reference/rpc/v26/DateRange` Dates used for the breakdown. For example, this represents the start and end dates of the week for a weekly breakdown. |