Information of advertising channel type and subtypes a category is available in.

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

| Fields ||
|---|---|
| ## `advertising_channel_sub_type[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdvertisingChannelSubTypeEnum.AdvertisingChannelSubType` Channel subtypes under the channel type the category is available to. |
| ## `advertising_channel_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdvertisingChannelTypeEnum.AdvertisingChannelType` Channel type the category is available to. |
| ## `availability_mode` | `https://developers.google.com/google-ads/api/reference/rpc/v26/CriterionCategoryChannelAvailabilityModeEnum.CriterionCategoryChannelAvailabilityMode` Format of the channel availability. Can be ALL_CHANNELS (the rest of the fields will not be set), CHANNEL_TYPE (only advertising_channel_type type will be set, the category is available to all sub types under it) or CHANNEL_TYPE_AND_SUBTYPES (advertising_channel_type, advertising_channel_sub_type, and include_default_channel_sub_type will all be set). |
| ## `include_default_channel_sub_type` | `bool` Whether default channel sub type is included. For example, advertising_channel_type being DISPLAY and include_default_channel_sub_type being false means that the default display campaign where channel sub type is not set is not included in this availability configuration. |