How Structural Discipline Built a Top-of-Funnel Acquisition Engine at $8.19 Per Course Sign-Up — From Zero
A greenfield Google Ads build for a US health-tech education platform. First 30 days. 148.5 course sign-ups. 24.79% conversion rate. The engine is validated — now it scales.
A top-of-funnel engine, built from scratch
The downstream conversion stack was already working. The acquisition layer didn't exist yet.
This wasn't a rescue mission. It was a greenfield build. The client — a US-focused health-tech education platform training developers and healthcare professionals on modern healthcare interoperability standards — came to us with a specific commercial ambition: establish a repeatable US audience acquisition channel that feeds the top of their funnel.
Their downstream engine was already in place: a free foundational course, an email nurture sequence, and a paid course catalogue that converts warmed-up learners into paying students. What they didn't have was a predictable way to fill the top of that funnel from the US market.
Our brief was clear. Build the acquisition engine. Prove that in-market US audiences can be acquired at a cost per sign-up that makes the nurture-to-paid economics work. Give the client a channel they can scale into with confidence. Building from zero is often framed as a disadvantage — in this specialist category, it was the opposite.
The healthcare interoperability search trap
Adjacent search traffic actively works against you in this category.
Healthcare interoperability sits inside a category where the search environment is structurally hostile. Search a certification-adjacent term for this audience and the same keyword set pulls in medical coders looking for jobs, nursing students hunting for certificates, HIPAA compliance officers, and a long tail of tangential healthcare intent. None of them are in-market for what the client is building. All of them are cheap to click.
That's the trap. Category volume looks abundant. The moment a campaign chases it, the conversion rate collapses, CPA drifts upward, and the algorithm learns the wrong lessons in its most impressionable early cycles. Our pre-spend diagnostic identified four conditions that had to be true from day one.
Built around one premise
The campaign should only ever see traffic it has a real chance of converting. Everything else was noise dressed as progress.
Cleaning up the traffic made more of it
The counterintuitive result at the centre of this campaign.
Between Jun 29 and Jul 1, we deployed a 100+ negative keyword layer against live search term data from the first three weeks. The prediction was that click quality would rise. What actually happened is more interesting: daily clicks lifted by roughly 70% in the post-negatives window — while conversion efficiency held. When Quality Score improves and ad rank climbs, the account earns better auction position without spending more. Cleaning up the traffic didn't just make it more valuable. It made there be more of it.
Every ad group telling a different story
The account architecture is the reason we can read intent stages — not just run them.
A 24.79% conversion rate on a specialist B2B search campaign is not typical. Healthy benchmarks in this category sit in the 5–8% range. Rates approaching 25% don't happen from bidding more aggressively — they happen when the traffic entering the funnel is almost entirely in-market, and the destination answers the question the buyer arrived with.
The important detail sits in the gradient itself. Because the account reads intent stages separately, the client can make informed downstream decisions — nurture cadence, offer sequencing, sales prioritisation — using ad-group-level signals. The two numbers below describe exactly what happens next.
A budget lever ready to pull now. Efficient unit economics constrained by a fixed daily cap — the demand is validated, the spend ceiling is the only constraint.
Pull this lever firstThe next quarter's work — continued ad quality improvement, bid refinement, landing page signals, and disciplined keyword expansion without diluting intent quality.
Q3–Q4 roadmapPrecision beats reach in specialist categories. In niches where the buyer is specific and the adjacent traffic is misleading, the winning strategy is aggressive exclusion, not aggressive inclusion.
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