Recommendation to lower Target ROAS when it is too low for Search campaigns.

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

| Fields ||
|---|---|
| ## `current_average_target_roas` | `double` Output only. The current average target ROAS of the campaign. |
| ## `recommended_target_multiplier` | `double` Output only. A number less than 1.0 indicating the factor by which we recommend the target ROAS should be decreased. |