> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/RealTimeBiddingSetting).

Settings for Real-Time Bidding, a feature only available for campaigns targeting the Ad Exchange network.

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

| Fields ||
|---|---|
| ## `opt_in` | `bool` Whether the campaign is opted in to real-time bidding. |