Category of a product offer.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/common/criteria.proto)

| Fields ||
|---|---|
| ## `category_id` | `int64` ID of the product category. This ID is equivalent to the google_product_category ID as described in this article: <https://support.google.com/merchants/answer/6324436> |
| ## `level` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ProductCategoryLevelEnum.ProductCategoryLevel` Level of the product category. |