How to Track Form Submissions as a Key Event in Google Analytics

Tracking form submissions as key events in Google Analytics 4 (GA4) allows you to see exactly where your leads are coming from, measure conversion rates, and optimize your campaigns. Using Formester along with Google Tag Manager (GTM) makes this setup simple and efficient.

Why Track Form Submissions

• Measure Conversions: Know which campaigns or pages are driving submissions.
• Optimize Marketing: Understand the source of your leads and improve targeting.
• Analyze Behavior: Combine with GA4 and other analytics tools to see user interactions.

Steps to Track Form Submissions

Step 1: Prepare Your Form and GTM Container

1. Open your Formester dashboard and select the form you want to track.
2. Ensure your form is connected to a GTM container (if not, follow the steps to install GTM in Formester).

Step 2: Configure Variables in GTM

1. Open your GTM container and go to Variables → Configure.
2. Enable all elements under Clicks and Forms.
3. These variables will help you detect which interactions trigger your events.

Step 3: Create a Trigger for Form Submission

1. Go to Triggers → New and rename it (e.g., All Clicks).
2. Select All Clicks → Clicks → All Elements.
3. Save the trigger.

Tip: Use the Tag Assistant in preview mode to interact with the form. This helps you identify specific clicks (like the submit button) and refine your trigger to only fire on relevant actions, for example, Click ID = form-submit.

Step 4: Create a GA4 Event Tag

1. Navigate to Tags → New and name it GA4 Form Submission.
2. Select Google Analytics → GA4 Event.
3. Paste your GA4 Measurement ID from your data stream.
4. Set the Event Name (e.g., form_submission).
5. Assign the form submission trigger created in Step 3.
6. Save the tag.

Step 5: Test the Event

1. Click Preview in GTM and open your form URL.
2. Interact with the form and submit it.
3. Check GA4 Debug View to see if the form_submission event fires correctly.

Step 6: Mark Form Submission as a Key Event in GA4

1. Go to GA4 → Admin → Events → Create Event.
2. Name the event form_submission.
3. Enable Mark as Key Event.
4. Save the event.

Now, the form submission is tracked as a key event, and you can view it in reports such as Traffic Acquisition or create filters and dimensions to see which pages, campaigns, or sources generated these leads.

Benefits of Tracking Form Submissions

• Measure which channels drive the most leads.
• Retarget users who started filling the form but did not submit.
• Improve form conversion rates by analyzing drop-offs.
• Gain accurate insights for marketing and product decisions.

By combining Formester, GTM, and GA4, you can create a fully automated workflow for tracking leads, optimizing campaigns, and understanding user behavior.

Updated on: 17/09/2025