GTM Setup
Stop guessing which ads actually work.
Every optimization call your team makes - a budget shift, a bid change, killing a creative - is only as good as the tracking data behind it. We audit, rebuild, and document your Google Tag Manager container so every conversion is counted once, correctly, everywhere.
0%
Accounts with duplicate conversions pre-audit
0h
Avg. turnaround for a full audit
0%
Tags documented at handoff
Duplicate tags
-100%
Conversion accuracy
+38%
What's Included
Full-service GTM setup.
Container Audit
A full audit of your existing container: duplicate tags, broken triggers, and tags firing on the wrong pages.
Conversion Tag Setup
Google Ads, Meta Pixel, LinkedIn, and TikTok conversion tags installed and verified against real conversions.
GA4 Event Configuration
Custom events, enhanced e-commerce, and goal mapping that actually match how your funnel works.
Enhanced Conversions & CAPI
Server-side matching for Google Enhanced Conversions and Meta Conversions API, so tracking survives ad blockers and iOS restrictions.
Server-Side Tagging
A first-party tagging server for platforms that support it, cutting data loss from browser-side blocking.
Consent Mode v2
GDPR/consent-compliant tag firing that still preserves modeled conversions where consent is denied.
Cross-Domain & Data Layer
Consistent data layer structure and cross-domain tracking for multi-site or multi-subdomain setups.
QA & Documentation
Every tag tested live and documented in a handoff file your team, or the next agency, can actually read.
Our GTM setup process
Click any step for more detail.
01 Audit
Full container diagnostic: which tags fire, how many times, and whether they match genuine user actions.
02 Rebuild & Implement
Clean tag, trigger, and variable structure built around how the business actually counts a conversion.
03 QA & Verify
Every tag tested live in preview mode before the container goes to publish.
04 Document & Handover
A full handoff file: what each event means, what triggers each tag, where every endpoint connects.
Tailored By Business Type
Who we help - and what we actually fix.
GTM for E-Commerce
Full enhanced e-commerce funnel: product views, add-to-cart, checkout initiation, purchase, plus Meta CAPI deduplication so one sale doesn't get counted across three campaigns at once.
- E-commerce event funnel
- Meta CAPI deduplication
- Enhanced Conversions for Shopping
GTM for SaaS & Lead Gen
Multi-step form and demo-request tracking tied to your CRM through offline conversion import, so bidding optimizes toward qualified leads, not just form fills.
- Multi-step form tracking
- CRM offline conversion import
- Lead quality tracking
GTM for Local Service
Dual call-and-form conversion tracking with call-tracking platform integration, so businesses that convert over the phone stop losing half their real leads out of the reporting.
- Call tracking
- Combined call & form conversions
- Call-tracking integration
GTM for Enterprise
Multi-container, multi-domain governance, one consistent data layer standard across every brand in the portfolio, and server-side infrastructure scoped for enterprise-level traffic.
- Multi-domain containers
- Unified data layer
- Server-side infrastructure
Why this matters more than ever
Figures reflect typical results across accounts we audit; individual results depend on the state of existing tracking.
What does GTM setup actually involve?
Google Tag Manager is the layer every conversion signal passes through before it reaches Google Ads, Meta, or GA4. When that layer is put together carelessly, hand-edited over years by different people with no documentation, every optimization algorithm in your account is making decisions on data nobody can actually trust. We audit the full container: which tags actually fire, on which pages, how many times, and whether each event matches what the business genuinely counts as a sale or a lead.
After the audit, we either rebuild the container from scratch where that's warranted, or fix specific tags and triggers where the foundation is sound. Either way, the outcome is the same: clean, documented conversion data you can actually make budget decisions against.
Where accounts most commonly break
The most common problem is duplicate tags: GA4 and legacy Universal Analytics running in parallel, or the same Google Ads conversion tag hard-coded into the site and also fired through GTM, so every conversion gets counted twice. Close behind is tags firing on a page refresh or a browser back button instead of a genuine user action, artificially inflating conversions and pushing the bidding algorithm to optimize against a fake signal.
The costliest gap is usually missing Enhanced Conversions and the Meta Conversions API. Without them, a share of real conversions simply disappears behind ad blockers and browser restrictions, and the bidding algorithm keeps working off an incomplete picture without ever knowing it.
Why we document everything we build
An undocumented GTM container is one nobody but its original author can safely change. Every project ends with a handoff document: what each event means, what triggers each tag, and where every server-side endpoint connects. That holds up even if a completely different team, or your own in-house hire, ends up working inside the container next.
Packages
Choose a starting point - we'll refine it after the audit.
Audit
€300 · one-time
For accounts that want to know how bad it actually is first.
- Full container audit
- Prioritized list of issues found
- Cross-platform discrepancy report
Full Setup
From €500 · one-time
For accounts ready to rebuild tracking end to end.
- Everything in Audit
- Full container rebuild
- Enhanced Conversions + CAPI
- Consent Mode v2
Enterprise
From €1,000 · project + retainer
For multi-domain or multi-brand accounts.
- Everything in Full Setup
- Server-side infrastructure
- Ongoing QA retainer
Our Stack
Tools & platforms we run on
From the blog
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Aug 21, 2026
AI Shopping Agents Now Convert 42% Better Than Humans. Your GA4 Still Shows None of Them.
AI-referred shopping traffic swung from converting 38% worse than humans to 42% better in a year - and 70% of it is invisible in a default GA4 setup.
Aug 20, 2026
ChatGPT Ads Launch in Europe August 24: Targeting, Costs, Real Numbers
ChatGPT Ads go live in 31 European countries on August 24, not September 1. Real CTR, conversion, and ROAS numbers, plus how targeting actually works.
Frequently asked questions
Do we need this if GA4 is already installed?
Having GA4 "installed" and having it configured correctly are two different things. Most accounts we audit are missing enhanced e-commerce events, have duplicated page_view or conversion tags, or never mapped conversions to match how the business actually counts a sale or a lead.
How long does a full audit take?
A container audit typically takes 3-5 business days. A full rebuild across GA4, Google Ads, and Meta usually runs 1-2 weeks, depending on how many accounts and platforms are involved.
What access do you need from us?
Admin access to the GTM container itself, plus edit access to whichever ad platforms and analytics properties need connecting: Google Ads, Meta Business Manager, GA4, and your CMS if a data layer needs to be added.
Can you fix a container another agency or developer set up?
Yes, this is one of our most common engagements. We start with a full audit before changing anything, since removing the wrong tag can silently break conversion data an entire campaign is already optimizing against.
What is server-side tagging, and do we need it?
It is a first-party tagging server that sits between your site and platforms like Google Ads and Meta, so tracking survives ad blockers and browser restrictions that increasingly cut off client-side pixels. Most accounts benefit from at least Meta CAPI on the server side; full server-side GTM is scoped case by case.
Do you handle Consent Mode and GDPR compliance?
Yes, Consent Mode v2 configuration, including modeled conversions for visitors who decline cookies, is part of every setup where it is legally relevant.
Do you maintain the container after launch, or is this one-time?
Audit and setup are a one-time project. Ongoing QA, monitoring for tags that silently break after a site update, and adding new conversion events as campaigns launch is available as a separate retainer.
Which platforms can you connect through GTM?
Google Ads, Meta, TikTok, LinkedIn, Pinterest, GA4, most CRMs via webhook or offline conversion import, and custom server-side endpoints where needed.
Ready to trust your numbers again?
Get a GTM container audit for €300 and see exactly where your tracking is counting things wrong.
Get My Audit