> [!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/CustomerOperation).

A single update on a customer.

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

| Fields ||
|---|---|
| ## `update` | `Customer` Mutate operation. Only updates are supported for customer. |
| ## `update_mask` | `FieldMask` FieldMask that determines which resource fields are modified in an update. |