The August 20 tagging overhaul collapses Google’s lightweight tag and GTM into one platform, changing how marketers manage measurement code without requiring existing Google tags to behave differently on-page.
Shopify’s August 26 deadline is a concrete compatibility cutoff for non-Plus stores. Legacy Thank you and Order status customizations must be rebuilt with supported blocks, web pixels or app pixels, or the automatic upgrade can break analytics and post-purchase behavior.