Why you don't know which ad brings in a consultation

You can't tell which ad brings in a consultation when your conversion tracking is off. Google Ads sees the clicks, but not who actually books afterwards. Usually there is no fixed measuring point after the booking, the account counts the wrong actions, or part of the data disappears because the cookie banner isn't set up properly. This article explains how tracking works, where it goes wrong and how to check it yourself.

A click is not a booking

Google Ads charges per click. A click only means someone opened your website. Whether they then book a consultation, call you or leave after ten seconds, Google only knows if you report it back. That reporting is called conversion tracking.

Without it, you're steering on clicks and click prices. A campaign with lots of cheap clicks looks successful, while a pricier campaign that actually fills your diary looks poor. We see this often in the accounts we review: campaigns that perform badly appear to work, and the other way round.

The three parts: GA4, Tag Manager and Google Ads

Reliable tracking takes three systems, each with its own role.

• Google Tag Manager is the hub for all tracking code on your website. You add one snippet to the site and manage what's measured from there, without asking your web developer every time.
• Google Analytics 4 (GA4) shows what visitors do on your site: which channel they came from, which pages they view and which actions they take.
• Google Ads receives the conversions and uses them to learn which keywords and ads lead to appointments. Smart bidding strategies such as 'Maximise conversions' rely entirely on these signals.

We regularly find websites without a single Google tag. Then there's no way to see how many visitors book a consultation or where they came from, and every budget decision is a guess.

Pick one clear measuring point: the thank-you page or booking confirmation

A conversion should count when someone has actually done something, not when they intended to. The best measuring point is the page that appears after a booking or request is completed: a thank-you page or the confirmation step in your booking system.

This is where it often goes wrong. The booking system runs on its own domain or in a window that doesn't report back to your site, so completed bookings go unmeasured. Or the form just shows a message on the same page after submitting, leaving nothing to measure. Ask your booking software provider whether you can set your own thank-you page or add a tracking code after confirmation.

Soft actions shouldn't count as main conversions

Not every click on your website is an enquiry. A click on 'Book now' isn't a booking, a tap on your phone number isn't a call, and opening WhatsApp isn't a message. These are soft actions: useful to track, but too early in the process to optimise for.

If you set soft actions as primary conversions, Google goes looking for people who like to click, not people who book. The account looks healthy while your diary stays the same. In Google Ads you can mark each conversion action as primary (used for bidding) or secondary (for reporting only).

• Primary: completed booking, submitted consultation request, call from an ad above a set minimum length.
• Secondary: click on a booking button, tap on phone number or WhatsApp, visit to the price page, scrolling or time on page.

Watch your own name too. People searching for your clinic by name already knew you. If a large share of conversions comes from those searches, it says little about how many new clients your ads really bring in. Look at brand searches separately.

Cookie consent and Consent Mode

In the Netherlands you generally need the visitor's consent for tracking and advertising cookies. Only analytics cookies with little or no privacy impact are exempt, and a standard GA4 setup linked to advertising usually doesn't qualify. If there's no cookie banner at all, you have a legal problem before you have a tracking problem. When in doubt, have your situation checked.

Consent Mode is how your cookie banner tells Google what the visitor chose, so Google's tags can adjust their behaviour. Since version 2 it passes four signals: advertising cookies, analytics cookies, sharing user data for advertising, and personalised ads. Google asks advertisers who reach users in the European Economic Area to send these signals. Without them you can lose features such as remarketing and part of your measurement.

There are two setups. In basic mode, Google's tags only load after consent. In advanced mode they load straight away but, without consent, send only cookieless signals that Google uses to estimate missing conversions. Which one fits depends on your cookie banner and your privacy choices.

Checklist: test your tracking in fifteen minutes

You don't need to be a specialist to check the basics. Go through these points, ideally with whoever runs your ads.

• Open your website and check that a cookie banner appears with a real choice, including the option to decline.
• Ask whether Google Tag Manager and GA4 are installed and who has access. You should be an administrator yourself.
• Make a test booking or request. Do you land on a thank-you page or a clear confirmation?
• In Google Ads, go to Goals, then Conversions, and see which actions are set as primary. Are they bookings and requests, or button clicks?
• Compare last month's conversions in Google Ads with the number of new consultations in your diary. A big gap means something is off.
• See what share of conversions comes from searches for your own name.
• Check that calls and WhatsApp contacts from ads are tracked separately, so you know how people get in touch.

Only once tracking is right does it make sense to use bidding strategies that optimise for conversions. Smart bidding fed with wrong or too little data learns the wrong things. In that case, fix tracking first and bid for clicks in the meantime.

Your next step

Start with one question to your agency or web developer: which actions currently count as primary conversions, and where exactly is a booking measured? If you don't get a clear answer, you know where to begin.

Would you like someone to go through it for you? In the free Clinic Scan, Clinic Agency carries out a full analysis across nine areas, including your tracking and advertising. Thomas gives you a short call beforehand with a few questions, and in a 30-minute meeting you receive the analysis and a tailored proposal. You're free to carry out the plan yourself.

Frequently asked questions

What's the difference between GA4 and Google Tag Manager?

Google Tag Manager is where you manage tracking code. GA4 is the analytics tool that collects and reports the data. Tag Manager makes sure GA4 and Google Ads receive the right events.

Can a click on 'Book now' count as a conversion?

You can track it, but set it to secondary. Only a completed booking or submitted request should count as a primary conversion for bidding.

Do I need Consent Mode if I already have a cookie banner?

Yes, if you use Google Ads or GA4 for visitors in the European Economic Area. The banner asks for consent and Consent Mode passes that choice on to Google, so the tags behave accordingly.