> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v25** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/AssetGroupOperation).

A single operation (create, remove) on an asset group.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/services/asset_group_service.proto)

| Fields ||
|---|---|
| ## `operation` Union field. The mutate operation. `operation` can be only one of the following: ||
| ### `create` | `AssetGroup` Create operation: No resource name is expected for the new asset group |
| ### `remove` | `string` Remove operation: A resource name for the removed asset group is expected, in this format: `customers/{customer_id}/assetGroups/{asset_group_id}` |
| ### `update` | `AssetGroup` Update operation: The asset group is expected to have a valid resource name. |
| ## `update_mask` | `FieldMask` FieldMask that determines which resource fields are modified in an update. |