How to Set Up Google Ads Conversion Tracking Correctly

By Jakob Böld on May 17, 2026 4:30:04 PM

Set up Google Ads conversion tracking

Many companies invest several thousand euros in Google Ads every month - but don't know exactly which campaigns really generate inquiries, purchases or sales.

The problem is often not the advertising itself but the tracking.
In many customer projects, we see incomplete or incorrect tracking setups: missing thank you pages, incorrectly configured conversions, duplicate events or pure button clicks as "leads".

The result: campaigns are optimized on the wrong data and budgets are used inefficiently.

Clean Google Ads conversion tracking is the foundation of any data-driven marketing strategy

Campaigns can only be meaningfully optimized if it is clearly measurable which ads actually generate sales or leads.

As an experienced Google Ads agency, we therefore pursue a clear KPI and data-driven approach. The "BI" in BeastBI stands for Business Intelligence for a reason. Decisions should not be based on a gut feeling, but on real data.

Why clean conversion tracking is so important

Google Ads today is heavily data-driven. Especially with Performance Max or Shopping campaigns, Smart Bidding or automated bidding strategies, Google relies on receiving correct conversion data. If the tracking is incorrect, in the worst case scenario Google will optimize for false leads, irrelevant clicks or conversions that are not actually real deals.

The problem with this is that the figures in the dashboard often look good anyway. Many companies are therefore happy about high click numbers, good CTRs and many "conversions", but later realize that no leads are arriving or that actual sales are not being made. Without proper tracking, you are often flying blind. If you need help with this, arrange a free initial consultation.

The most common tracking errors in practice

In many accounts we see the following problems again and again.

1. No clear thank you pages

One of the most common mistakes: Conversions are only measured via button clicks. The problem with this is that there are often several steps between clicking on "Send now" and actually completing the order. Many users cancel the process, reload the page or click several times. This quickly results in distorted conversion figures.

We therefore almost always recommend clear thank you pages in order to really only measure completed leads or purchases.
This is because a thank you page that has been reached is much more meaningful than a simple button click.

2. Embellished conversion figures

Without proper tracking logic, more conversions are often counted than actually occur. As a result, campaigns appear more profitable than they are, customers develop false expectations and optimizations are based on incorrect data. This becomes particularly critical when companies get the feeling that "Google Ads isn't working". The problem is often not with Google Ads itself, but with inaccurate measurement data.

3. Missing CRM assignment

Another problem: leads are generated but not correctly recorded or assigned in the CRM. This results in incorrect decisions.
We have already had cases in which budgets were reduced even though enough leads were actually generated - these were simply not properly assigned in HubSpot.

That's why the connection between:

Google Ads,
tracking,
website,
and CRM systems

extremely important.

4. Lack of KPI definitions

Many companies launch campaigns without clear objectives. There are no definitions for cost-per-lead targets, target ROAS, budget limits or concrete KPI specifications. As a result, optimization is often emotional instead of data-driven. Performance marketing should be exactly the opposite: define clear goals, measure and optimize based on data.

Our recommendation for a clean tracking setup

The requirements naturally differ depending on the company and the objective.

In many projects, however, we work with the following setup:

Google Tag Manager (GTM)
Google Analytics 4 (GA4)
Google Ads Conversion Tracking
Google Merchant Center
HubSpot
Shopify or individual systems such as Lovable

The Google Tag Manager in particular offers enormous advantages:

flexible event control,
centralized administration,
simpler testing,
and significantly more control over tracking processes.

Why "test, test, test" is so important

Tracking is not automatically correct just because "some numbers" arrive.

That's why we test setups intensively:

Are events really triggered?
Are the conversion values correct?
Is the correct thank you page captured?
Does the consent handling work correctly?
Are purchases transferred correctly to Google Ads?
Does the data match the CRM?

Errors can quickly occur, especially after website changes or relaunches.
That's why tracking is not a one-off setup, but an ongoing process.

GA4 or direct Google Ads tracking?

That depends heavily on the goal. For classic lead conversions, we often work directly with Google Ads Conversions, the Google Tag Manager (GTM) and unique thank you pages. This is often the cleanest and simplest solution, especially for lead forms.

However, if sales values, e-commerce data or more complex customer journeys are to be transferred, we often rely on a combination of GTM, GA4 and additional tracking logic. This allows much more detailed data to be recorded and analyzed.

Why many companies draw the wrong conclusions

A common misconception: if there are no sales, marketing must be to blame. In practice, however, this is often too short-sighted.
Marketing can reach the right people, generate relevant leads and create awareness. In the end, however, the company itself has to make the sale.

Many other factors therefore play a role in lead campaigns in particular:

fast response times,
good sales processes
functioning follow-up,
simple contact options,
convincing offers,
and a good user experience on the website.

If these processes are missing, even the best performance marketing will only bring limited results.

Data instead of gut feeling

Many companies still optimize campaigns according to personal preferences, beautiful ads or expectations. The data usually provides very clear answers. If keywords are not working, ads are not producing results, campaigns are becoming too expensive, you have to be prepared to adjust them based on data or even turn them off.

For a good performance marketing agency, this does not mean
We hope it works, but we test, analyze and optimize. Targeting budgets where results are generated. Key figures such as: CTR, CVR, cost per conversion, ROAS, lead quality play a decisive role.

Merchant Center: Often underestimated

We often see problems with the product feed, especially in e-commerce.
Many companies work with manual uploads in the Google Merchant Center. However, this often leads to outdated product data & errors, rejected products or problems with price and availability changes.

We therefore recommend continuous crawling or a dynamic feed solution wherever possible so that product data remains up-to-date and campaigns can run stably.

Conclusion: Clean tracking is the basis of every optimization

Without clean tracking, campaigns cannot be reliably evaluated.
This often leads to the following:

Budgets are allocated incorrectly,
campaigns are paused unnecessarily,
or companies make the wrong decisions.

A functioning setup consisting of Google Ads, GTM, GA4, CRM, Consent and clearly defined KPIs is therefore not a technical side issue, but the basis for data-driven growth. Because only those who measure correctly canoptimizesensibly.

Google Ads Consulting & Tracking Audit

Are you unsure whether your tracking is set up correctly or would you like to optimize your campaigns in a data-driven way?

Together we will analyze your existing setup, identify weak points and develop a solution that really suits your company.

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