Listing dimensions for the asset group listing group filter.

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

| Fields ||
|---|---|
| ## `dimension` Union field. Dimension of one of the types below is always present. `dimension` can be only one of the following: ||
| ### `product_brand` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductBrand` Brand of a product offer. |
| ### `product_category` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductCategory` Category of a product offer. |
| ### `product_channel` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductChannel` Locality of a product offer. |
| ### `product_condition` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductCondition` Condition of a product offer. |
| ### `product_custom_attribute` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductCustomAttribute` Custom attribute of a product offer. |
| ### `product_item_id` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductItemId` Item id of a product offer. |
| ### `product_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.ProductType` Type of a product offer. |
| ### `retail_filter_bundle` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.RetailFilterBundle` Dimension for Retail Product Tags. |
| ### `webpage` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ListingGroupFilterDimension.Webpage` Filters for URLs in a page feed and URLs from the advertiser web domain. |