Google Ad_Storage Becomes the Single Source of Truth on June 15
On June 15, 2026, Google Analytics stops co-controlling Google Ads data collection — ad_storage becomes the single signal. WooCommerce stores with mis-propagated Consent Mode V2 will see Smart Bidding decay and remarketing audiences shrink, exactly as 31% of global cookie acceptance rates and the silent July 21, 2025 enforcement already telegraphed. Stores have 49 days to audit four parameters (ad_storage, ad_user_data, ad_personalization, analytics_storage), verify the default-denied state fires before GTM, and confirm consent propagates into any server-side pipeline. Server-side routing reduces this to one verification point instead of five.