Open this lesson in your favourite AI. It'll walk you through the why, explain the demo, and quiz you on the try-it list.
Analytics bugs are invisible until they corrupt weeks of data — DebugView and event validation let you catch missing parameters, wrong event names, and double-firing tags in real time before they reach production reports.
debug_mode: true on your GA4 tag in GTM, trigger a purchase event on a staging environment, and verify in DebugView that all required parameters (transaction_id, value, currency, items) appear with correct types.collect? requests — confirm every network request produces exactly one event row in DebugView, ruling out double-firing.Use these three in order. Each builds on the one before.
In one paragraph, explain what GA4 DebugView is and what category of analytics problems it is specifically designed to catch.
Walk me through exactly how enabling `debug_mode` changes the data pipeline — where does the event go differently, how long does it stay in DebugView, and why doesn't it appear in standard reports?
Given a GTM container with 40 tags where a `purchase` event is firing twice on one checkout flow, walk me through the systematic debugging process you'd use in DebugView and GTM Preview to isolate and fix the double-fire.