How do I verify GA4 is tracking correctly?
Applies to: Google Analytics 4 (GA4)
Last updated: May 2025
Problem
You’ve installed Google Analytics 4 using gtag.js or Google Tag Manager, but you’re not sure whether it’s working correctly or collecting data from your website or app.
Solution
Use a combination of GA4’s Realtime report, Google Tag Assistant, and optionally DebugView to confirm your installation is functioning as expected.
Step-by-Step Guide
Option 1: Use GA4 Realtime Report
- Go to https://analytics.google.com
- Select your GA4 property
- Navigate to Reports > Realtime
- Open your website in another tab (or another device/browser)
- You should see yourself appear as an active user on the site
- Location, device type, and page title should populate
The Realtime report is updated every few seconds.
Option 2: Use Google Tag Assistant (Chrome Extension)
- Install: Tag Assistant Companion
- Open your website in Chrome
- Enable the Tag Assistant extension and start recording
- Refresh your website
- Check that the GA4 tag fires successfully and shows the correct Measurement ID
Option 3: Use GA4 DebugView (Advanced)
This is useful when you want to see detailed event-level tracking:
- Open Google Tag Manager > Preview
- Enter your website URL and start preview mode
- Go to your GA4 property in Google Analytics
- Navigate to Admin > DebugView
- Interact with your website — all events should appear in the DebugView stream in real time
DebugView only shows events from devices in debug mode, such as when using GTM preview or browser debug extensions.
Common Things to Check
| Issue | Cause | Fix |
|---|---|---|
| No data in Realtime | Measurement ID missing or incorrect | Double-check tag code or GTM config |
| Tag not firing | GTM not published | Submit and publish the container |
| Events missing in DebugView | No debug mode enabled | Use GTM Preview or enable debug manually |
| Duplicate tracking | Two config tags firing | Check GTM and inline code for duplicates |
Notes
- GA4 typically starts showing non-realtime data within 24–48 hours
- Don’t expect full reports immediately — some data (e.g., conversions, attribution) takes time to populate
- Be patient with new properties — data flow may take a few minutes to appear
