Audience metrics for the planned products. These metrics consider the following targeting dimensions:

- Location
- PlannableAgeRange
- Gender
- AudienceTargeting (only for youtube_audience_size)

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

| Fields ||
|---|---|
| ## `census_audience_size` | `int64` Reference audience size matching the considered targeting for Census. |
| ## `youtube_audience_size` | `int64` Reference audience size matching the considered targeting for YouTube. |