I've audited a few hundred ecom Google Ads accounts over the last three years. The ones stuck under $5M a month all hired an agency doing what Google Ads agencies were supposed to do in 2022. The platform moved. The model didn't.
$150M+
managed across 350+ DTC brands
Same pattern. Spend grows, performance plateaus. Healthy dashboard, flat P&L.
PMax took over Shopping. AI Max went GA. iOS broke tracking. Branded-search bleed inflated ROAS. The agency you hired in 2022 now covers about 30% of the surface that matters. The other 70%, landing pages, creative, feed engineering, server-side tracking, AI ops, sits unowned.
THE FIVE SURFACES
What 'the system around the ad' actually means
The five surfaces that drive ecom performance, what each controls, and who's usually holding the bag:
One campaign, six surfaces. That is the spread your spend runs across, which is why owning the inputs matters.
Surface | What it controls | Who usually owns it |
|---|---|---|
Landing pages | Conversion rate, message-to-ad match, advertorial and VSL performance | Nobody, or a subcontractor briefed cold each time |
Creative volume | Ad relevance, auction competitiveness, creative fatigue and refresh cadence | A freelancer or creative agency on a separate contract |
Feed engineering | Shopping eligibility, title match, custom label routing, multi-country compliance | The brand's in-house team, usually under-resourced |
Server-side tracking | Conversion signal quality, Smart Bidding accuracy, match quality score | A web developer hired once, rarely maintained |
AI ops | Weekly spend audit, anomaly detection, competitor moves, bidding logic | The agency buyer, who also manages 12 other accounts |
Most agencies own the last column of one row. The rest accumulates as debt.
THE STRUCTURAL PROBLEM
Why traditional agencies can't ship all five
The agency hired a buyer, not a landing-page team, not a feed engineer, not a tracking architect. Subcontractors don't compound: every brief starts cold.
The fix: all five surfaces inside one team, one account.
DUE DILIGENCE
Three questions for any agency call
Landing pages and creative, in-house or subcontracted? Third-party ownership means you pay twice: the fee and the lag.
Show me your weekly readout for a $500K/month client. No POAS, no MER? You're hiring a reporter.
Spend drops 20% tomorrow, how fast do you know? "Monthly review" means the system doesn't exist.
PMax structure audit
27-point checklist: asset-group architecture, audience signals, search themes, custom-label routing. Free.
Tell me your agency setup and I'll tell you which surface is weakest. Hit reply.
P.S. Five surfaces, one team, no subcontractors. That's the model for 2026.
Talk soon,
Patrick
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