How to Test Google Tag Manager Events in GA4 (Step-by-Step Verification Guide)

Learn how to properly test and verify Google Tag Manager (GTM) events before publishing them live. In this step-by-step tutorial, we walk through the complete process of creating a new event in Google Tag Manager, validating that it fires correctly in Tag Assistant, and confirming that the event is reporting in Google Analytics 4 (GA4).

Using a phone click tracking example, you'll learn how to:

• Create a GA4 event in Google Tag Manager
• Build a trigger that captures phone number clicks
• Use GTM Preview Mode and Tag Assistant to test events
• Verify event parameters such as link URL and phone number
• Use GA4 DebugView to confirm data is being received
• Troubleshoot event tracking before publishing changes

This process is essential for ensuring your conversion tracking is accurate and your GA4 reports contain reliable data.

In this tutorial:

• Google Tag Manager event testing
• Phone click tracking
• GTM Preview Mode
• Tag Assistant debugging
• GA4 DebugView
• Event verification and troubleshooting

Whether you're tracking phone calls, form submissions, button clicks, or other website interactions, this workflow will help you validate your setup before pushing changes live.