Multi-Domain Analytics & Conversion Tracking System (GA4 + GTM)

Project Overview

This project focused on building a complete analytics and tracking infrastructure for a healthcare business operating across multiple domains and third-party booking systems.

At the start, the business had broken tracking, unreliable data, and no clear attribution, making it impossible to understand which marketing efforts were actually driving patient bookings.

The goal was to implement a fully functional GA4 + GTM system, establish accurate conversion tracking, and deliver a 12-month reporting framework for decision-making.

Key Challenges Identified

1. Broken Tracking Setup

GA4 tags were present but not firing, meaning no real data was being collected.

2. Third-Party Booking Limitations

Appointment bookings happened inside external schedulers, making conversion tracking unreliable.

3. Attribution Gaps

Traffic from Google Ads, GMB, and organic sources was mixed and unclear.

4. Multi-Domain Complexity

Main website + landing pages were not connected, leading to underreported data.

5. No Historical Reporting

There was no 12-month data baseline for performance analysis.

Solution & Approach

1. Full GA4 & GTM Audit

• Validated tracking using DevTools, Tag Assistant, and DebugView
• Fixed broken tags and ensured proper data flow

2. Advanced Conversion Tracking

• Implemented custom booking event tracking using DOM detection
• Built a reliable appointment_booked event system

3. Multi-Domain Tracking Setup

• Combined main website + landing pages into unified reporting
• Fixed attribution gaps across domains

4. Attribution Framework

Structured traffic into:

• Paid Search
• Organic
• GMB (Google Business Profile)
• Direct
• Referral

5. 12-Month Reporting System

• Extracted and structured data manually from GA4
• Built a clean reporting model in Excel
• Created a repeatable monthly reporting workflow

Key Results

• 100% working conversion tracking for appointment bookings
• Clear multi-channel attribution system implemented
• 12-month reporting baseline delivered
• Accurate traffic segmentation across 6 channels
• Improved decision-making with reliable data
• Scalable reporting system for future growth

Business Impact

The project transformed a non-functional analytics setup into a fully reliable tracking and reporting system.

Now the business has:

• Clear visibility into where leads come from
• Reliable data for marketing decisions
• A structured system for ongoing reporting
• A scalable foundation for paid ads and growth

Technologies Used

• Google Analytics 4 (GA4)
• Google Tag Manager (GTM)
• Google Ads
• Google Business Profile (GMB)
• Excel / Google Sheets
• Chrome DevTools
• Tag Assistant