Ad sharing across ad groups deprecated; creation removed from all API versions on January 28, 2026

The ability to link one Ad to multiple ad groups was removed from all supported API versions with the v23 release on January 28, 2026; shared ads stop serving in Q2 2026 and Google automatically creates individual copies. Developers must create a distinct ad per ad group and migrate shared ETAs to responsive search ads.

New per-ad-group ads start with zero performance history; Google recommended exporting historical stats of shared ads before migrating. The post includes a GAQL query on ad_group_ad to detect ads whose ad_group_ad.ad.id appears under multiple ad_group.id values.