This value indicates which field within the 'oneof' group (where only one option can be active) is used in the channel controls for a Demand Gen ad group.

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

| Enums ||
|---|---|
| ## `CHANNEL_STRATEGY` | The channel controls configuration uses a general channel strategy; individual channels are not configured separately. |
| ## `SELECTED_CHANNELS` | The channel controls configuration explicitly defines the selected channels. |
| ## `UNKNOWN` | The value is unknown in this version. |
| ## `UNSPECIFIED` | Not specified. |