A campaign for which the quote is requested.

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

| Fields ||
|---|---|
| ## `campaign` | `string` Campaign for which the quote is requested. Format: customers/{customer_id}/campaigns/{campaign_id} |