> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/PlannableUserListMetadata).

The metadata associated with a plannable user list.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/services/reach_plan_service.proto)

| Fields ||
|---|---|
| ## `user_list_crm_data_source_type` | `UserListCrmDataSourceType` The data source type of a CRM based user list. |