The possible goal optimization eligibility.

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

| Enums ||
|---|---|
| ## `ELIGIBLE` | The goal is eligible for campaign optimization. |
| ## `INELIGIBLE` | The goal is not eligible for campaign optimization. |
| ## `UNKNOWN` | The goal optimization status is not known in this version. |
| ## `UNSPECIFIED` | The goal optimization status has not been specified. |