What conversion should you track in Google Ads? It sounds like a setup question, the kind of thing you tick off in week one and never think about again. It isn’t. It’s the single most strategic decision in the account, and I can’t begin to tell you how many businesses get it wrong.
You set up Google Ads. You pick a conversion goal. The algorithm goes off and finds you more of that conversion. The ads work. The numbers look fine. But six months in, you look at your bank balance and the maths doesn’t quite add up.
That’s the gap most accounts are sitting in right now. The ads are working perfectly well, technically. They’re just working perfectly well at the wrong thing.
This is something we’ve been wrestling with on two healthcare partner accounts at Base Brands this past couple of weeks, and it’s worth writing about, because the lesson applies way beyond healthcare.
The problem: your ads can only optimise for what your tracking can see
Conversion tracking sounds like a technical setup task. Get GTM in place, fire a tag on the right page, job done. But what you’re actually doing when you set up a conversion is telling Google “this is the thing I want more of.” And the algorithm will dutifully chase whatever you point it at.
Which is fine if what you’ve pointed it at is the actual outcome that makes your business money.
The problem is that for a lot of businesses, especially service businesses and anyone with a back-end booking or CRM system, the actual outcome can live somewhere Google can’t see.
Patient management software is locked down for privacy reasons. Membership platforms keep their booking data internal. Phone calls go to reception and never get logged back into the ad account.
So you do the next best thing. You optimise for a proxy.
A page view on the booking page. A click on the “book now” button. A form submission. Something that lives on the website and that the algorithm can see.
This works, sort of. It gets you closer to the outcome. But it’s not the outcome itself, and the gap between the proxy and the real thing is where a lot of ad spend goes to die.
What changed for our healthcare partner
Two healthcare partners of ours, until recently, had this exact problem. They run Google Ads to bring in new patients. Their booking platform is locked down because of patient data, which makes total sense. But it meant the booked appointment, the actual thing that matters, was invisible to Google.
For what feels like decades… we worked around it. We optimised for the closest thing the website could see. We tracked appointments by hand against ad spend. We knew the campaigns were working, but we were aiming at the bullseye through a window with the curtains half drawn.
It’s an odd visual I know, but stick with me here.
Recently their booking platform updated. For the first time, we could pull the booked appointment through as a proper conversion goal in Google Ads. The actual bullseye. The thing that pays the bills.
So we made the switch.
What happens when you switch to a harder, more valuable goal
The first thing we noticed was that spend dropped. Reach pulled back. Conversions, on the new goal, came in slowly… way too slowly for someone with my patience, or lack of it.
If you didn’t know what was happening, you’d assume the account had broken. It hadn’t. The algorithm was recalibrating. The previous goal was higher up the funnel and easier to hit, so the algorithm had been spending the budget freely because it was finding plenty of those conversions.
The new goal sits at the very bottom of the funnel. Booked appointments happen far less often than page views or button clicks. The algorithm has less data to learn from, and instead of burning budget guessing, it pulls back and waits.
This is actually Google being respectful of your money, believe it or not. The algorithm is saying “I don’t know how to find this for you yet, give me a minute.”
It feels frustrating. You want to spend, because you want to get to the new goal faster. But the algorithm needs time to learn what the new goal looks like, who the people are who hit it, and what signals predict it.
Google’s own documentation suggests it can take around 50 conversion events or three conversion cycles to settle. For a low-volume, high-value action like a booked appointment, that’s a couple of weeks at minimum.
The trade you're making
The honest version of this is that you’re trading volume for value.
The old conversion goal was easy to hit. We’d see it in abundance. The numbers looked great in the dashboard. But we knew, from cross-checking against the booking system, that not all of that traffic actually became patients. A lot of it was clicks and page views that looked like progress and weren’t.
The new goal is harder to hit. We see it less often. The numbers look smaller in the dashboard. But every single conversion we record is a real, paid-for booked appointment.
Five shots that all land in the bullseye is a better outcome than fifty shots that land somewhere on the outer ring.
I hope you love this analogy as much as I do.
How we do it at Base Brands
When we onboard a new ad account, the first conversation isn’t always about budget or creative. It’s about what the account can actually see.
We map out the customer journey end to end.
- Where does someone come in from an ad?
- Where do they go next?
- Where does the money actually change hands?
Then we work backwards from there to figure out which of those steps Google can track natively, which ones need offline conversion imports, and which ones we need to build a workaround for using GTM, GA4, or a CRM integration.
The point isn’t to track everything. It’s to track the right thing. The closer your tracked conversion is to the moment money changes hands, the harder it is to optimise for, but the more truthful your account becomes.
What it actually takes
Holding your nerve through the messy middle is the hardest part. The temptation to revert is real. Spend has dropped, conversions look down, the dashboard is showing red where it used to show green.
The discipline is to remember that you’ve changed what the dashboard is measuring. The numbers aren’t directly comparable any more, so you’re not behind, you’re recalibrating.
Two weeks is roughly the window.
After that, if the algorithm hasn’t started picking up speed, then yes, look at whether the goal is realistic for the budget, whether the volume is too thin, whether you need to layer the new goal alongside the old one for a transition period.
Before two weeks, intervening usually just resets the learning phase and prolongs the pain.
Frequently asked questions
Should every business optimise for the deepest conversion?
Not always. If your sales cycle is long or your conversion volume is very low, the algorithm may not get enough data to learn properly. In those cases, optimising for a strong intent signal further up the funnel and using the deeper conversion as a secondary measurement goal is often the right move.
How long should I wait before deciding a new conversion goal isn’t working?
Around two weeks, or 50 conversions, whichever comes first. That’s enough time for the learning phase to settle and for genuine performance signals to emerge.
My spend has dropped since I changed my conversion goal. Is the account broken?
Almost certainly not. It’s recalibrating. The algorithm pulls back when it doesn’t yet know how to find the new goal. Don’t intervene. Watch it for a fortnight.
What if my back-end system can’t talk to Google Ads?
There are workarounds. Offline conversion imports via GCLID, CRM integrations, server-side tracking through tools like Stape. Most platforms can be made to talk to Google Ads with a bit of plumbing. The question is whether the value of the data justifies the build.
Want this done for you?
If you’re running ads and the dashboard numbers don’t quite line up with what you’re seeing in the bank account, your tracking is probably the ceiling.
We help businesses figure out what the right conversion goal actually is, build the tracking that lets the algorithm see it, and hold the line through the recalibration period.
Get in touch with us today and let’s see how we can help you.
