Represents an action type used for building remarketing user lists.

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

| Fields ||
|---|---|
| ## `user_list_action` Union field. Subtypes of user list action. `user_list_action` can be only one of the following: ||
| ### `conversion_action` | `string` A conversion action that's not generated from remarketing. |
| ### `remarketing_action` | `string` A remarketing action. |