Marketing teams don't trust their numbers. I fix that.

Laurent Fidahoussen, Senior Ads, Tracking & Analytics Expert.
I rebuild measurement systems when client-side breaks, server-side doesn't match, and consent kills your signal.
25 years in tech, 10 years making data reliable in complex e-commerce stacks.

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Selected Projects

Analytics QA & Monitoring

Analytics QA & Monitoring

Implementation of analytics quality assurance and monitoring processes to detect tracking issues early. This includes event validation, data consistency checks, and ongoing monitoring to ensure reliable and trustworthy analytics over time.

Server-Side Tracking Implementation

Server-Side Tracking Implementation

Design and deployment of server-side tracking architectures to improve data reliability, security, and compliance. This approach ensures consistent data delivery to platforms like GA4 and Meta while reducing client-side limitations.

E-commerce Tagging Plan & Custom DataLayer

E-commerce Tagging Plan & Custom DataLayer

Design and implementation of advanced e-commerce tagging plans and custom dataLayers. This ensures consistent event tracking, reliable transaction data, and full alignment between analytics, media platforms, and business KPIs.

Commanders Act & Server-Side Tag Management

Commanders Act & Server-Side Tag Management

Migration from client-side to server-side tag management using Commanders Act to regain control over data collection. This setup reduces adblock impact, secures data flows, and ensures compliant, reliable tracking across analytics and media platforms.

CMP & Consent Management (GDPR)

CMP & Consent Management (GDPR)

Implementation and optimization of Consent Management Platforms to ensure GDPR compliance without sacrificing data quality. The focus is on reliable consent signals, controlled tag activation, and preserving analytics and media performance.

GA4 & CAPI Tracking Audit

GA4 & CAPI Tracking Audit

End-to-end audit of GA4 and Conversion API implementations to identify tracking gaps, data inconsistencies, and attribution issues. The goal: restore reliable measurement, align analytics with media platforms, and enable confident data-driven decisions.

Latest Insights

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commanders act

Tag Commander Multi-Container: Why Your Variables Show ‘Unset’ (A Complete Timing Breakdown)

Three containers. Perfect architecture on paper. 60% unset variables in production. That was my week. A client approached me with what seemed like a textbook Tag Management System setup: one core container for essential tracking, two business-unit-specific containers for specialized marketing tags. Clean separation of concerns. Different teams managing their own implementations. Excellent governance model. […]

google

Why Your GA4 Variables Show ‘Unset’ (And How to Fix It)

You’ve spent hours configuring Google Tag Manager. Every variable is mapped. Every trigger fires perfectly in Preview mode. You test, retest, and finally hit publish with confidence. The next morning, you open GA4 reports. 40% of your custom event parameters show “(unset)”. Welcome to one of the most frustrating debugging experiences in web analytics: the […]

tech

Universal Commerce Protocol (UCP): The Open Standard Rebuilding E-Commerce for the Agentic Era

How Google, Shopify, and 60+ industry leaders are solving the n² integration problem that’s been strangling conversational commerce The Problem: A Commerce Bottleneck Hiding in Plain Sight The rise of AI agents as shopping interfaces exposed a fundamental architectural flaw in digital commerce. Every time a new conversational AI surface launches—ChatGPT, Gemini, Perplexity, or any […]

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Ready to fix your tracking?

Laurent Fidahoussen

📍 Paris, France