They trusted me
Laurent Fidahoussen, senior ads, tracking & analytics expert. For e-commerce and marketing teams whose GA4, ad platforms and back office don't report the same numbers.
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They trusted me
What clients tell me on the first call, and what I do about it.
“I no longer trust my numbers.”
Adobe Analytics, GA4: metrics, segments, bot filtering, KPIs put back on track.
Benchmark: in 2025, more than half of all web traffic (53%) came from bots, not humans (Thales).
“My app and my website are two different worlds.”
Bridge from web to app into Firebase, visitor reconciliation (visitorId), no double counting.
Benchmark: shopping apps convert more than 3 times better than mobile web (21% vs 6%, Criteo, 2018).
“My ads can’t see my sales.”
Conversion pixels, Meta CAPI, server-side, Eulerian tag management, multichannel acquisition source management, Google and Meta audiences.
Benchmark: adding the Conversions API to the Meta pixel cuts cost per action by 13% on average (Meta).
“Consent is cutting off my data.”
CMP (Didomi, Tarte au Citron) and Consent Mode v2, tested market by market.
Benchmark: with Consent Mode, Google recovers on average more than half of the conversions lost when visitors decline cookies (Google).
“We’re launching a brand and rebuilding the site.”
GTM client and server-side, Commanders Act, Adobe Launch: from tagging plan to QA, with UX, design and digital marketing teams.
Benchmark: a 0.1 s faster mobile site lifts retail conversions by 8.4% (Deloitte study for Google).
Analytics
Adobe Analytics
GA4 · Firebase
AppsFlyer · Eulerian
Tag management
GTM client + server
Commanders Act
Adobe Launch
Stape · Addingwell
Ads
Google Ads
Meta Ads + CAPI
Consent
Didomi
Tarte au Citron
Consent Mode v2 · TCF
Data
Looker Studio / Data Studio
Snowflake
Python
No blind quotes: we measure first, then we fix.
I list the gaps on your real data, with proof for each problem.
1–2 weeks · written report
Every fix with its impact, its effort and the recommended order.
I fix, then I check that the numbers keep matching over time.
2–4 weeks
“[…] his ability to bridge technical, product, and analytics teams.”
Head Of Acquisition Online & Data Activation
SFR
“Laurent is a true accelerator of reliability and analytical performance in complex organizations.”
Director, Advanced Data Insights Analytics
Egencia
“[…] turning complex business requirements into reliable, actionable implementations.”
Web Analyst
TheFork
A quick call to understand where your numbers drift. No commitment.
Book a callTell me about your tracking, analytics or ads setup. We look at what breaks and what to fix first.
Based in Paris · no commitment.
