> [!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/GoalTypeEnum.GoalType).

The possible value of goal types.

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

| Enums ||
|---|---|
| ## `CUSTOMER_RETENTION` | Retention goal, which allows advertisers to optimize campaigns to win back lapsed customers. See <https://support.google.com/google-ads/answer/14792043> to learn more. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |