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Measurement

Google Ads conversion tracking, because bad data just makes you confidently wrong

Almost every account I audit has a measurement problem, and most of the owners do not know it. Conversions counted twice, GA4 disagreeing with the ad platform, and nobody willing to say which number is real. Everything downstream inherits that error.

14+Years Experience
4Platforms
1Source Of Truth
At a glance

The facts, before the copy

What it is
Conversion tracking and measurement setup (GA4, Google Tag Manager, offline import)
Delivered by
Diego Zietek, independent consultant (no agency team)
Platforms
Google Analytics 4 and Google Tag Manager, Google Ads, Meta Ads
Who it is for
Advertisers whose ad platform reports and CRM disagree
Markets served
United States, Canada, United Kingdom, Ireland, Portugal, remote, in English
Pricing
Fixed-price audit or month-to-month retainer, quoted on the first call. How pricing works
Proof
Mission AC & Plumbing case, Paid Media Cost Index
Contact
Send a message or schedule a call
The Problem

How you know your tracking is wrong

If more than one of these is familiar, it is worth checking.

Your platforms disagree and nobody reconciles them

Google Ads says 40 conversions, GA4 says 26, the CRM says 12. All three are measuring different things and no one has written down which one decisions are made on.

The same lead counted several times

Form submit, thank-you pageview and phone call all firing as conversions for one enquiry. Reported CPA is a third of reality and every bid decision is built on it.

Nothing flows back from the CRM

The ad platform never learns which leads became customers, so it keeps optimising for the cheapest enquiry rather than the ones worth having.

Tracking broke and nobody noticed

A site redesign or consent banner change silently stops the tag firing. Without monitoring, this is usually discovered weeks later, after the bidding has already adapted to the wrong signal.

What You Get

What the setup covers

One defined source of truth, and every platform reconciled against it.

GA4 and Tag Manager, audited and rebuilt

Events, conversions and data streams configured to reflect how your business actually works, with duplicates removed and definitions written down.

Server-side tagging and Meta CAPI

Recovers a meaningful share of conversions lost to browser restrictions and ad blockers, so bidding learns from a fuller picture.

Offline conversion import

CRM outcomes fed back with values attached, so the platform optimises toward closed revenue instead of form fills. This is usually the single highest-impact item on the list.

Call tracking where calls matter

For any business where the phone is the conversion, calls tracked to keyword level and, where possible, to outcome rather than just to ringing.

Reporting you can actually read

A Looker Studio dashboard tied to your real conversion data, plus a written read on what changed and why. No 40-tab spreadsheet, no vanity metrics, no 'impressions are up' as a headline.

This is the work I insist on doing first in any engagement. If you only ever buy one thing from me, it should probably be this one.

Proof

What I have actually run

Some engagements have verified public numbers. Others are longer-running or confidential roles where I can speak to scope and approach but not exact percentages. I would rather show you the real mix than invent a case study.

Mission AC & Plumbing, Houston, TX

Freelance · May 2025 to Feb 2026
44%CPA Reduction
60%More Qualified Leads

Roughly $20K per month in Google Ads spend, in a market with $45 to $80 CPCs.

Healthcare, in-house

Five years in the sector

Alongside consulting I hold a senior in-house paid media role in healthcare. Nothing from that work is published anywhere on this site: no employer named, no budgets, no results, no internal detail. It is listed only because it is where a large part of my healthcare experience comes from.

How It Works

How it runs

1

Audit

What is firing, what is double counting, what is missing, and which number is currently trusted.

2

Define

Agree one source of truth and write down what each conversion actually means.

3

Implement

GA4, GTM, server-side, CAPI and CRM import built and validated event by event.

4

Monitor

Alerting so a silent tracking break is caught in days rather than discovered next quarter.

Go Deeper

Related guides

Long-form writing on this topic from the blog.

What Is Different

Why tracking set up by the campaign operator holds up

  • The person who will run the campaigns defines each conversion by what the business counts as a sale, not by what the platform suggests at setup.
  • Phone and offline outcomes are connected back to the click through call tracking and CRM import, which is exactly where most setups stop.
  • Every tag, trigger and conversion is documented, so the next person can audit the account without calling me.
Who It Is For

Who this service fits

Advertisers whose ad platform reports and CRM disagree about what happened.

  • Accounts running Smart Bidding on conversions nobody fully trusts.
  • Businesses where the real sale happens on the phone or offline and never reaches the platform.

Not a fit: A site with no analytics access, or a team unwilling to add tags: tracking cannot be fixed from the outside.

FAQ

Tracking questions

Can you do this without managing our campaigns?

Yes, and plenty of clients buy only this. It is a discrete project with a clear end, and it makes whoever runs your ads better at their job, including your current agency.

Do we need server-side tagging?

Not always. It matters most where a lot of traffic is on browsers that restrict tracking, or where Meta is a significant channel. I will tell you if the added complexity is not worth it for you.

Will this work with our CRM?

HubSpot, Salesforce, Pipedrive and most modern systems, yes. Older or custom systems usually still work through a scheduled export. If yours genuinely cannot, I will say so early.

How long does it take?

Typically two to four weeks depending on how many platforms and how much has to be untangled. Most of the time goes into validation rather than implementation, which is the part that gets skipped elsewhere.

Get In Touch

Tell me what you are working with

A short form beats a long discovery call. Give me the basics and I will come back with a straight read on whether I can help, usually within one business day.

  • No sales sequence. You get a reply from me, not a nurture flow.
  • If I am not the right fit, I will say so and point you somewhere better.
  • Prefer to talk live? Book a slot instead, link below.

Rather book a time directly? Schedule a call.

I read every message myself. No newsletter, no list, no follow-up sequence.