> [!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/CustomerLabelService).

Service to manage labels on Google Ads customers.

This service is commonly used by manager accounts to apply their own labels to their client accounts. The label entity must exist under the manager account.

[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_label_service.proto)
The following methods are available for this service:

- [MutateCustomerLabels](https://developers.google.com/google-ads/api/reference/rpc/v24/CustomerLabelService/MutateCustomerLabels.md.txt)