Google Tag Manager

One control panel
for all your measurement tools.

One measurement code pasted here by a past contractor, another added there, a third forgotten: it's the most common scenario, and the most fragile. I set up Google Tag Manager as the single control panel for all your measurement and advertising tools: every addition or change takes a few clicks, without touching the site or slowing it down.

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In detail

Google Tag Manager évite d'avoir à toucher au code du site à chaque nouvel outil de mesure, mais mal utilisé il devient un dépotoir : balises en double — une balise est un petit script de mesure —, scripts oubliés qui ralentissent le chargement, déclencheurs qui se marchent dessus. Un conteneur propre repose sur une couche de données pensée en amont — la liste organisée des événements que le site raconte : quels événements, quelles variables, quel nommage — plutôt que sur des balises empilées au fil des besoins. Je mets en place cette structure, je documente ce qui existe, et je fais le ménage dans les conteneurs hérités.

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Le gain se voit sur deux plans : des données fiables, et un site qui ne s'alourdit pas à chaque campagne.

Features

What you get.

01

Everything in one place

Facebook measurement (Meta Pixel), Google Analytics, Google ads tracking and any other tool gathered at a single point, instead of scattered and hardcoded into the site.

02

Measuring without calling a developer

A click, a page read to the bottom, a form submitted, a product added to cart: each action gets measured by simple configuration, with no code work for every request.

03

The right to a mistake

Every change is recorded. A botched setting? Back to the previous version in one click, with no risk to the live site.

04

A site that stays fast

The measurement scripts load without blocking the display, instead of piling up in the pages and delaying what the visitor sees.

05

The visitor's choice respected

Each tool only fires if the visitor said yes on the cookie banner, in line with the European rules (GDPR).

06

Your team self-sufficient

Once everything is structured and documented, your team (or me under maintenance) adds a tool or adjusts a setting without a dev ticket or a production release.

Method

How we proceed.

01

Taking inventory

I list every measurement script on the site, often hardcoded, and spot the duplicates and obsolete leftovers.

2-3 days
02

Installing the control panel

Google Tag Manager installed across all pages, then progressive migration of the existing tools from the site's code into that single point.

2-3 days
03

Configuring the measurements

Each action to track (clicks, forms, cart, purchases) wired up cleanly, with the information each tool needs.

1 week
04

Honouring the cookie choice

Connected to your consent banner: each tool only fires if the visitor agreed.

3-5 days
05

Checking, then publishing

Each measurement validated in preview mode: nothing counts twice, nothing is missing. Then the whole thing is published.

3-5 days
FAQ

Frequent questions

Does GTM slow down my site?
No, quite the opposite: properly configured, it loads measurement tools in the background, without delaying page display. A site where scripts have been added by hand here and there is often slower than one where everything goes through a well-kept Google Tag Manager.
What is the difference from adding GA4 or Meta Pixel directly in the code?
Google Tag Manager centralizes everything in one place: a single management point, clear documentation, the ability to roll back. Adding each tool directly into the code multiplies the risk of error and makes the slightest change dependent on a developer.
Is it compatible with GDPR consent banners?
Yes, it's actually one of its main benefits: each measurement tool only fires if the visitor has given consent, thanks to Google's Consent Mode v2, working with Axeptio, Didomi or any other consent banner.
How much does setting up GTM cost?
On a creation or redesign project, installation is included. On an existing site where scattered scripts need to be brought together: €500 to €1,200 depending on their number and the complexity of the firing rules.
See also

Related pages.

Card payments with Stripe PayPal alongside cards Your ad budget under control Google Analytics 4 for e-commerce
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