Enum containing possible custom audience member types.

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

| Enums ||
|---|---|
| ## `APP` | Users who have installed a mobile app. |
| ## `KEYWORD` | Users whose interests or actions are described by a keyword. |
| ## `PLACE_CATEGORY` | Users who visit place types described by a place category. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |
| ## `URL` | Users who have interests related to the website's content. |