Enumerates keyword plan concept group types.

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

| Enums ||
|---|---|
| ## `BRAND` | The concept group classification is based on BRAND. |
| ## `NON_BRAND` | These concept group classification is not based on BRAND. This is returned for generic keywords that don't have a brand association. |
| ## `OTHER_BRANDS` | The concept group classification based on BRAND, that didn't fit well with the BRAND classifications. These are generally outliers and can have very few keywords in this type of classification. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | The concept group classification different from brand/non-brand. This is a catch all bucket for all classifications that are none of the below. |