Positive audience segment.

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

| Fields ||
|---|---|
| ## `segment` Union field. Positive segment. `segment` can be only one of the following: ||
| ### `custom_audience` | `https://developers.google.com/google-ads/api/reference/rpc/v26/CustomAudienceSegment` Custom audience segment. |
| ### `detailed_demographic` | `https://developers.google.com/google-ads/api/reference/rpc/v26/DetailedDemographicSegment` Detailed demographic segment. |
| ### `life_event` | `https://developers.google.com/google-ads/api/reference/rpc/v26/LifeEventSegment` Live-event audience segment. |
| ### `user_interest` | `https://developers.google.com/google-ads/api/reference/rpc/v26/UserInterestSegment` Affinity or In-market segment. |
| ### `user_list` | `https://developers.google.com/google-ads/api/reference/rpc/v26/UserListSegment` User list segment. |