Do we lose years of historical conversion and revenue-attribution data when migrating a custom platform's tracking setup to Shopify?
Historical revenue survives a migration and historical session attribution does not. Imported orders carry the processed date that Shopify's analytic reports use (per shopify.dev, September 2026), so sales history rebuilds. Session-level metrics do not rebuild: Shopify's acquisition reports hold no session data before 1 October 2022, and GA4 standard properties keep event data 14 months at most.
