Setting Up Conversion Tracking Correctly With GA4

Conversion tracking is the prerequisite for truly steering your marketing. With Google Analytics 4 (GA4), you measure what counts — if the setup is right. If you have no idea which ad, which channel, or which page actually leads to an inquiry, you end up distributing your budget by gut feeling. A well-thought-out tracking concept is exactly what helps you avoid that.

Why Conversion Tracking Matters

Only those who measure can optimize. Conversions show which channels bring in inquiries — and which ones just deliver traffic without substance. Without this information, every decision about budget, campaigns, or content remains pure guesswork. With clean tracking, you can see, for example, whether a Google Ads campaign actually triggers contact inquiries or whether organic search is doing the real work. This is also valuable for internal communication: when you can show management or your team which channel contributes what, a gut feeling becomes a demonstrable statement. That applies just as much to small websites as to complex shops with many touchpoints.

It's important not to mark every little thing as a conversion. If you classify too many events as important, you dilute the meaningfulness of your actual goals. At the start, it's worth asking: which two or three actions are truly decisive for the business? That could be a submitted contact inquiry, a purchase in the shop, or a whitepaper download that leads to a lead.

GA4 Thinks in Events

Unlike Universal Analytics, GA4 is event-based. Important actions are marked as conversions. That sounds technical at first, but at its core it's simple: every interaction on the website — a click, a form submission, a page view — can be captured as an event. GA4 captures some events automatically, such as page views or scroll depth. Others you need to define yourself, such as submitting a contact form or completing a purchase.

From these events, you then select the ones that actually represent value for your business and mark them as a conversion. In practice, this means you define that, for example, the "form_submit" event or a custom-named event like "inquiry_sent" counts as a conversion. After that, these completions appear in the relevant reports and can be attributed to campaigns, channels, and landing pages. If you work precisely here — for instance by distinguishing between a simple contact inquiry and an actual completed purchase — you'll get far more meaningful reports later than with a rough setup.

For the technical implementation, Google Tag Manager is often a good choice, because it makes creating and adjusting events easier without having to change the website's source code every time.

Don't Forget Consent

Without consent, only limited, modeled data flows in. In the age of GDPR and ePrivacy, that's not optional — it's a requirement: tracking may generally only take place with the consent of users. Google developed what's called Consent Mode for this, which collects varying amounts of data depending on the consent given. If someone declines tracking, GA4 works with estimates based on the data of users who did consent — accuracy drops accordingly.

For you, this means: a legally sound consent banner isn't just important from a compliance standpoint — it also directly affects the quality of your data. The more people consent, the more reliable your reports become. You can learn how to think about tracking, consent, and IT security together under Data Privacy & IT Security.

Clean Beats Cluttered

A well-thought-out setup beats a zoo of tools. There's little point in installing five additional tracking tools alongside GA4 if no one on the team evaluates the results consistently or if the data even contradicts itself. It makes more sense to focus on one central system, name events cleanly, and define conversions clearly. That creates a reliable data foundation that dashboards and reporting can also build on.

Once the groundwork is in place, it's worth looking at the analysis: which campaign brings in the most qualified inquiries? Which landing page converts better than others? Questions like these can only be answered if tracking, consent, and reporting work cleanly together. Tracking, Analysis & Dashboards can support you in implementing a setup like this. If you want to dive deeper into the technical details of GA4, you'll find further information in the GA4 documentation.