Google Ads is automatically migrating Performance Max campaigns using consistent brand assets (BUSINESS_NAME, LOGO, LANDSCAPE_LOGO).
Starting May 1, 2025, UI-managed campaigns will be migrated, followed by API-managed campaigns on June 1, 2025, with full completion by July 31, 2025.
Brand assets will be stored at the campaign level instead of the asset group level after migration.
To stay ahead, Google recommends manual migration using CampaignService. Enable PMaxBrandGuidelines before the automatic transition.
For further support, read the official announcement: Upcoming Performance Max campaign migration to enable brand guidelines.