AI-generated Key Takeaways
- 
          This content describes the status of a campaign's upgrade to a Performance Max campaign using different enums. 
- 
          The enums indicate whether the upgrade is in progress, complete, failed, eligible, not specified, or unknown. 
- 
          If the upgrade fails, the campaign will continue to serve in its previous state. 
Performance Max Upgrade status enum for campaign.
| Enums | |
|---|---|
| 
 | Not specified. | 
| 
 | Used for return value only. Represents value unknown in this version. | 
| 
 | The upgrade to a Performance Max campaign is in progress. | 
| 
 | The upgrade to a Performance Max campaign is complete. | 
| 
 | The upgrade to a Performance Max campaign failed. The campaign will still serve as it was before upgrade was attempted. | 
| 
 | The campaign is eligible for upgrade to a Performance Max campaign. |