> [!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/BiddingSeasonalityAdjustmentOperation).

A single operation (create, remove, update) on a seasonality adjustment.

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

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