GA4 has been fully live for over a year and many brands still haven't set it up correctly. If your analytics aren't tracking properly, every decision you make based on that data is built on sand.

The Essential Setup Checklist

Common Mistakes to Avoid

Don't compare GA4 data to Universal Analytics — the measurement model is different. Don't rely on "sessions" as your primary metric; GA4 is event-based. And always validate your data with a test transaction before declaring setup complete.