A metric goal for an experiment.

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

| Fields ||
|---|---|
| ## `direction` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ExperimentMetricDirectionEnum.ExperimentMetricDirection` The metric direction of the goal. For example, increase, decrease, no change. |
| ## `metric` | `https://developers.google.com/google-ads/api/reference/rpc/v26/ExperimentMetricEnum.ExperimentMetric` The metric of the goal. For example, clicks, impressions, cost, conversions, etc. |