Why 'GA4 is already installed' is not the same as measured
Every Dhaka business we audit has GA4 firing something. The problem is what it's firing. Purchase events with zero revenue. Add_to_cart tracked but not begin_checkout. Cross-domain sessions counted as new users. GA4's data model is unforgiving — one wrong parameter and an entire funnel collapses. A rebuild treats measurement as engineering, not a checkbox.

