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Five GA4 Setup Mistakes That Quietly Ruin Your Data

Five common setup mistakes that make GA4 report the wrong numbers.

rinkusaini

Key takeaways

  • Mark your key events or conversion reports stay empty
  • Filter internal traffic
  • Avoid duplicate tags
  • Use one consistent UTM naming system
  • Extend your data retention period

Switching to GA4 was not simple for most teams. Many accounts were set up quickly and never checked.

1. No key events marked

GA4 only treats events you mark as key events as goals. If none are marked, your conversion reports stay empty.

2. Internal traffic not filtered

Your own team visits inflate numbers. Filter internal traffic so your data reflects real customers.

3. Duplicate tags

Having both a hard-coded tag and a Tag Manager tag can double count every page view.

4. Messy UTM tags

Inconsistent names like Facebook, facebook and fb split your traffic into separate rows. Agree on one naming system.

5. Data retention left on default

The default retention period is short for some reports. Extend it so you can compare longer periods.

A simple monthly check

  • Test your key events in DebugView
  • Compare GA4 sales to your store sales
  • Review traffic sources for strange spikes

Perfect matching is not realistic, but large gaps mean something is broken.

Want a clean setup? We configure GA4 and Google Tag Manager for e-commerce and lead generation websites.

Written by

rinkusaini

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FAQ

Questions, answered

Why do my GA4 sales not match my store?

Small gaps are normal, but large gaps usually mean broken tags, duplicate events or missing consent data.

How often should I audit GA4?

Run a quick check every month.

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