Book an Audit

Tracking & Measurement Services

Accurate tracking for
better marketing decisions.

I help eCommerce brands, lead-generation businesses, and marketing teams diagnose data leaks, architect clean GA4 & GTM setups, deploy server-side tracking, and fix Meta & Google Ads attribution — so your budget decisions are based on real numbers.

Book a Tracking Audit Get Quote
Pipeline Status: Active
DataLayer Synchronized
Server Container
sGTM Stape
✓ 200 OK
Meta CAPI
Deduplicated
✓ Event ID Match
GA4 E-commerce
100% Parity
✓ Order Verified
Real-Time Event Stream Latency < 35ms

Platforms & Tools We Work With

Everything You Need for Reliable, Revenue-Driving Data

From forensic audits to full server-side deployment, I help eCommerce and growth-focused businesses set up tracking that actually works — so you can make smarter decisions and scale with confidence.

GA4

Setup, auditing, custom event schemas & reporting

Explore

GTM

Clean setup, custom dataLayer & troubleshooting

Explore

Meta CAPI

Conversions API, advanced matching & deduplication

Explore

Server-Side

Stape.io, sGTM, 1st-party cookies & ITP resilience

Explore

Google Ads

Conversion tracking, Enhanced Conversions & ROAS

Explore

Shopify

Web Pixels API, checkout tracking & order reconciliation

Explore

The Problem

Why Tracking Breaks

Most businesses think their tracking is working — but it's often incomplete, inaccurate or missing key events.

Missing or duplicated purchase conversions
iOS privacy restrictions & ad blocker data loss
Incorrect event setup or broken variables in GA4 & GTM
Broken Meta CAPI or missing server-side deduplication
Inaccurate revenue data & attribution lag in Google Ads
Shopify checkout updates, app conflicts & theme changes

The Difference

Guessing vs. Getting It Right

See how proper technical tracking changes your decision-making and ad performance.

Metric / Area Without Specialist Tracking With Rehan Asadi
Data Accuracy ✕ Often inaccurate ✓ Clean, reliable data
Conversion Tracking ✕ Missing or duplicated ✓ Complete & deduplicated
Ad Performance ✕ Wasted ad spend ✓ Higher ROAS & Smart Bidding
Attribution Clarity ✕ Incomplete channel data ✓ Full-funnel visibility
Decision-Making ✕ Based on guesswork ✓ Backed by real numbers
Revenue Growth ✕ Limited by data gaps ✓ Unlocks confident scale
Service 01

GA4 Setup and Architecture

Google Analytics 4 requires deliberate architectural planning. Default automated setups miss vital user journey touchpoints, mangle currency conversions, and create unmanageable data streams. I build structured, noise-free GA4 implementations that give leadership and marketing teams full visibility.

What's Included in This Service
  • Comprehensive dataLayer audit and custom JavaScript trigger configuration
  • Standard e-commerce event mapping: view_item, add_to_cart, begin_checkout, and purchase
  • Custom parameter schema definition (user properties, content groupings, and conversion flags)
  • Cross-domain measurement configuration across payment gateways and subdomains
  • Internal traffic exclusion, referral exclusion lists, and 14-month data retention activation

Need to troubleshoot an existing GA4 setup? Review my GA4 Conversion Diagnostic Guide.

GA4 Architecture DataLayer Mapping Cross-Domain DebugView E-commerce Schema
Engagement
Custom Quote
One-time Project

Best Fit For

  • Brands migrating or setting up GA4 the right way
  • Teams dealing with unmapped or inaccurate event parameters
  • Agencies needing clean, handover-ready client containers
Turnaround
3–5
Business days from access
Scope
Full Setup
Includes QA & Handover
Get Quote
Service 02

Server-Side Tracking (sGTM)

Browser-based tracking is increasingly degraded by Safari ITP cookie caps, ad-blocking extensions, and iOS privacy updates. Server-Side Google Tag Manager moves data collection from the visitor's browser to your own first-party cloud server, extending cookie life and recovering lost conversion signals.

What's Included in This Service
  • Dedicated sGTM container provisioning on Stape.io or Google Cloud Platform (GCP)
  • Custom first-party subdomain setup (e.g., data.yourbrand.com) with SSL and DNS routing
  • First-party cookie persistence engineering to bypass Safari ITP 7-day expirations (up to 400 days)
  • Client-side tag migration to sGTM: routing GA4, Meta CAPI, and Google Ads through your server
  • Header stripping and PII protection to maintain GDPR/ePrivacy compliance

Read the complete technical blueprint in my Server-Side Tracking Setup Guide.
*Verified outcome: Up to 400-day cookie persistence achieved in the NordSleeps case study.

sGTM Stape.io Certified Google Cloud 1st-Party Cookies ITP Resilience
Engagement
Custom Quote
One-time Project

Best Fit For

  • High-growth brands with noticeable ad attribution gaps
  • Stores with significant iOS/Safari customer traffic
  • Teams preparing for strict privacy & cookie regulations
Turnaround
5–7
Business days from access
Host
Stape / GCP
Custom Subdomain
Get Quote
Service 03

Meta CAPI and Attribution

Running Meta Ads solely through a browser pixel leaves your campaigns vulnerable to iOS data loss and low Event Match Quality (EMQ). This service adds server-side Meta Conversions API (CAPI) with rigorous event deduplication so Meta's bidding algorithms receive complete, reliable signals.

What's Included in This Service
  • Full Meta Pixel and Event Manager diagnostics to identify drop-offs and low EMQ scores
  • CAPI setup via server-side GTM or direct platform integration
  • Server-side event deduplication with matching event_id parameters to prevent double-counting
  • Customer Information Parameter mapping (hashed email, phone, external ID, IP, user agent)
  • Aggregated Event Measurement (AEM) priority configuration in Events Manager

Learn how deduplication and match quality work together in the Meta CAPI Setup Guide.
*Verified outcome: +22% Event Match Quality lift documented in the Slageronline.nl case study.

Meta CAPI Meta Pixel EMQ Lift Event Deduplication AEM
Engagement
Custom Quote
One-time Project

Best Fit For

  • Advertisers with low EMQ scores (under 6.0/10) in Events Manager
  • Shopify and DTC brands seeing Meta under-reporting purchases
  • Regulated niches needing compliant server-side data routing
Turnaround
3–4
Business days from access
Type
Full CAPI
Server Deduplication
Get Quote
Service 04

Google Ads Conversion Measurement

Smart Bidding in Google Ads is only as effective as the conversion signal it receives. If purchase values are unverified or offline leads are unaccounted for, your campaigns bid blindly. I configure precision tracking with Enhanced Conversions so your ad budget is directed to high-value customers.

What's Included in This Service
  • Conversion action restructuring: separating primary bidding actions from secondary observation goals
  • Google Ads Enhanced Conversions for web and leads via GTM dataLayer or API
  • Transaction deduplication with dynamic order IDs to prevent duplicate conversion inflation
  • Offline conversion tracking (OCT) setup for CRM leads and phone call conversions
  • Direct GA4 conversion import vs. native Google Ads tag performance comparison and audit
Google Ads Certified Enhanced Conversions Smart Bidding Lead Tracking ROAS Accuracy
Engagement
Custom Quote
One-time Project

Best Fit For

  • Advertisers running Search, Performance Max, or YouTube ads
  • Accounts experiencing high CPCs with uncertain lead attribution
  • Brands seeking to activate Google Ads Enhanced Conversions
Turnaround
3–5
Business days from access
Coverage
PMax / Search
Enhanced Conversions
Get Quote
Service 05

Shopify & E-commerce Tracking

Shopify checkout updates, post-purchase upsell apps, and checkout domain redirects frequently break standard tracking pixels. This service rebuilds your entire e-commerce measurement pipeline across Shopify, Customer Events Web Pixels, GA4, Meta, and Google Ads.

What's Included in This Service
  • Shopify Customer Events Web Pixel API or custom dataLayer implementation
  • Full item-scoped event mapping: view_item_list, view_item, add_to_cart, begin_checkout, and purchase
  • Handling of multi-currency conversions, order discounts, shipping, and tax parameters
  • Resolution of duplicate purchase tracking on thank-you page refreshes and order status re-visits
  • Full order reconciliation between Shopify Admin orders and GA4/Ad platform recorded revenue

Having checkout drops or missing purchase events? Read our dedicated Shopify GA4 Tracking Fix Guide.
*Verified outcome: 100% order reconciliation achieved in the Packaging Discounter NL case study.

Shopify Web Pixels API E-commerce Funnel Order Reconciliation WooCommerce
Engagement
Custom Quote
One-time Project

Best Fit For

  • Shopify and Shopify Plus merchants scaling ad spend
  • Stores with post-purchase upsells or custom checkout flows
  • Brands with substantial revenue gaps between store admin & GA4
Turnaround
3–5
Business days from access
Platform
Shopify / Woo
Full Funnel QA
Get Quote
Service 06

Ongoing Tracking Retainer & QA

Tracking systems break quietly when developers push code, CMS plugins update, or ad platform APIs change. My ongoing retainer provides continuous monitoring, monthly health checks, and rapid troubleshooting to ensure your analytics and attribution remain bulletproof.

What's Included in This Service
  • Monthly health checks across GA4, GTM, Meta CAPI, and server-side containers
  • Post-deployment QA after theme changes, new app installs, or checkout updates
  • Up to 5 hours of direct implementation updates and tag maintenance each month
  • Priority response window (<24h on business days via WhatsApp or email)
  • Monthly measurement summary and quarterly deep-dive strategy review
Monitoring Maintenance Priority SLA 5 hrs/month Direct WhatsApp
Engagement
Monthly Retainer
Ongoing Support

Best Fit For

  • Active eCommerce stores running aggressive ad spend
  • Agencies requiring white-label technical tracking support
  • Businesses with frequent website updates and developer sprints
SLA
<24h
Priority support
Included
5 Hours
Monthly implementation
Get Quote

Structured Execution

How I deliver verified tracking setups.

A transparent, 4-step execution process from initial discovery to final data validation.

01

Discover & Audit

I audit your current tag container, examine website code and checkout pages, and identify data leaks or duplicate triggers.

02

Architecture & Plan

I draft a custom measurement blueprint: defining exact event names, dataLayer schemas, user properties, and server endpoints.

03

Implement & Route

I configure GTM tags, provision first-party server containers, implement Meta CAPI deduplication, and map conversion values.

04

Validate & Handover

Rigorous sandbox and live transaction testing. We reconcile recorded analytics purchases against your store backend order numbers.

Client Fit

Who these services are designed for.

E-commerce & Shopify Brands

Active eCommerce stores scaling paid ad campaigns that need accurate ROAS calculations, full checkout funnel visibility, and order deduplication.

Meta & Google Advertisers

Media buyers and growth teams who need high Event Match Quality (EMQ) and Enhanced Conversions to feed Smart Bidding algorithms with clean signals.

Lead Generation & Agencies

B2B companies, clinics, and digital marketing agencies needing white-label tracking architecture, qualified lead tracking, and reliable handover setups.

Documented Client Proof

Real setups. Documented outcomes.

Explore all case studies
Slageronline.nl tracking proof E-commerce / NL

Slageronline.nl: +22% Event Match Quality Lift

Dutch butcher store was missing ~35% of purchase events due to browser ad-blocking. Deployed sGTM on Stape.io with Meta CAPI deduplication and GA4 e-commerce mapping.

View case details
NordSleeps GTM rebuild proof DTC / NL

NordSleeps: 400-Day Cookie Persistence & Container Rebuild

Safari ITP capped cookies at 7 days, blinding returning attribution. Deployed server-side first-party cookies via Stape.io and eliminated 40+ conflicting agency tags.

View case details
Packaging Discounter order reconciliation proof B2B / NL

Packaging Discounter: +60% Data Recovered & 100% Reconciliation

GA4 reported 60% fewer conversions than actual Shopify orders due to 3 duplicate tags. Rebuilt a single source-of-truth GTM container with 100% order reconciliation.

View case details

Technical Knowledge Base

Deep-dive tracking guides.

Explore in-depth documentation on common tracking errors, architectural fixes, and best practices.

Shopify + GA4

Shopify GA4 Tracking Fix

Step-by-step diagnostic breakdown for resolving missing purchase events and checkout drops.

Read guide Server-Side GTM

Server-Side Tracking Setup

How sGTM with Stape.io bypasses browser blockers and extends cookie persistence.

Read guide GA4 Diagnostics

GA4 Not Tracking Conversions

The 7 most frequent reasons GA4 underreports conversions and how to fix each one.

Read guide Meta CAPI

Meta CAPI Setup Guide

Fixing server deduplication, customer parameter hashing, and Event Match Quality.

Read guide

Frequently Asked Questions

Questions about services & delivery.

What tracking platforms do you work with?
I specialize in Google Analytics 4 (GA4), Google Tag Manager (Web & Server-Side containers), Meta Conversions API (CAPI), Google Ads conversion tracking, and Stape.io. On the store side, I work with Shopify, Shopify Plus, WooCommerce, Magento, custom web apps, and CMS platforms.
Can you fix an existing GA4 or GTM setup without starting over?
Yes. Many engagements involve auditing and refining existing containers. I clean up orphaned tags, resolve duplicate purchase firing triggers, align measurement IDs, and ensure proper dataLayer variables without disrupting existing historical reporting.
Do I need server-side tracking if I already have standard GA4 and Meta Pixel?
If your business spends meaningfully on paid advertising or receives substantial traffic from iOS / Safari devices, server-side tracking is highly recommended. Client-side pixels lose 20% to 40% of conversion data due to ad-blockers and Safari 7-day ITP caps. Server-side tagging (sGTM) recovers this lost data and extends cookie persistence up to 400 days.
What access is required to begin implementation?
Typically, I require Editor access to Google Tag Manager, Administrator/Editor access to GA4, Partner or Admin access to Meta Business Manager / Events Manager, and standard collaborator or staff access to your website CMS (e.g., Shopify Collaborator or WordPress Administrator).
Can you coordinate with our existing web developer or marketing agency?
Yes. I frequently collaborate with internal development teams, agency account managers, and freelance media buyers. I provide precise technical dataLayer specifications and handle all GTM/server configurations directly, minimizing the workload for your engineers.
How do you validate conversion accuracy before project completion?
I conduct end-to-end sandbox and live testing. Every conversion action is validated in GTM Preview mode, GA4 DebugView, and Meta Test Events. Following live release, I reconcile incoming analytics purchases directly against your store backend order numbers to confirm 100% parity.
Do I need to start with a diagnostic tracking audit?
If you have a clear, specific requirement (such as setting up a new server container or adding Meta CAPI), we can proceed directly to implementation. If you are experiencing unexplained discrepancies or inherited a broken setup, the diagnostic tracking audit is the recommended starting point to identify root causes and map out fixes.
How are project scopes and quotes determined?
Every tracking project is scoped based on your specific tech stack, domain architecture, and measurement objectives. Single-domain setups with standard platforms are scoped quickly, while complex multi-domain environments or custom headless stores receive a clear, transparent quote before any work begins.
Ready To Fix Your Tracking?

Get a Free Quote on Your Tracking Project

Tell me about your current setup, ad spend, and store platform, and I'll recommend the most effective tracking architecture for your business.

Get Quote Chat on WhatsApp
Talk to a tracking specialist Direct 1-on-1 advice • Fast response
Chat on WhatsApp