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Fixing Broken Shopify Analytics: GA4, GTM, and Ecommerce Tracking Setup for a D2C Fashion Brand
Fully rebuiltGA4, GTM, and Shopify analytics
Analytics Stack
Eliminatedpreviously inflating conversion data
Duplicate Tracking
Accurate & reliablefor evidence-based media buying
Data Foundation
The Challenge
A D2C fashion brand on Shopify was making critical marketing and inventory decisions without reliable data. Their GA4 setup was misconfigured, GTM was absent, and Shopify's native analytics were not properly integrated. The result: no accurate visibility into traffic sources, conversion funnel behaviour, or revenue attribution — meaning every media buying decision was based on guesswork.
Our Strategy
Before any marketing optimisation is possible, data infrastructure must be accurate. We audited the full analytics stack, identified every misconfiguration and gap, and rebuilt systematically — GA4, GTM, and Shopify analytics — establishing a reliable data foundation for all future decisions.
Execution
Audited existing GA4 property: identified misconfigured events, duplicate tracking from simultaneous native + GTM firing, and missing conversion goals
Configured Google Tag Manager with properly structured tags, triggers, and variables for all key Shopify events: page view, product view, add to cart, initiate checkout, and purchase
Fixed GA4 ecommerce event setup to capture complete product-level data for transactions, cart events, and item views
Set up Shopify's native analytics integration for cross-referencing and reconciliation with GA4 data
Validated all tracking via GA4 real-time debug mode and live test transactions
Built a standard ecommerce reporting view with core KPIs: sessions, conversion rate, revenue, average order value, and traffic source attribution
Key Takeaways
- ✦Marketing optimisation without accurate tracking is guesswork — fixing data infrastructure delivers higher ROI than any ad optimisation on broken analytics
- ✦GTM is the right management layer for Shopify ecommerce events — direct native integrations are often unreliable and harder to maintain
- ✦Always validate analytics with real test transactions before trusting any conversion data for media buying decisions