A placement criterion. This can be used to modify bids for sites when targeting the content network.

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

| Fields ||
|---|---|
| ## `url` | `string` URL of the placement. For example, "http://www.domain.com". |