Enumeration of different brand request rejection reasons.

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

| Enums ||
|---|---|
| ## `EXISTING_BRAND` | Brand is already present in the commercial brand set. |
| ## `EXISTING_BRAND_VARIANT` | Brand is already present in the commercial brand set, but is a variant. |
| ## `INCORRECT_INFORMATION` | Brand information is not correct (eg: URL and name don't match). |
| ## `NOT_A_BRAND` | Not a valid brand as per Google policy. |
| ## `UNKNOWN` | Used for return value only. Represents value unknown in this version. |
| ## `UNSPECIFIED` | No value has been specified. |