The marketing director should not have to brief the data layer

Look at what a hospitality marketing director is now expected to be fluent in. Consent management. Server-side tracking. Attribution modelling. Data layer specifications. Conversion APIs. Audience match rates. Identity resolution across a PMS, a booking engine and an email platform that each hold a different version of the same guest.

None of that was in the job description. All of it now determines whether the marketing works.

How this happened

It happened gradually and for reasonable reasons. Browser changes broke measurement. Platforms moved to server-side integrations. Privacy regulation made data handling a compliance question. Each shift moved a little more technical responsibility towards whoever cared most about the outcome — which was marketing.

Meanwhile the people who might have absorbed that responsibility were pointed elsewhere. IT is focused on operational systems, security and uptime. The agency is scoped to a channel. The booking engine vendor supports its own product. Nobody owns the layer in between, so it lands with the person whose numbers stop making sense when it breaks.

Why it is a bad allocation

Not because marketing directors cannot learn it. Many of the best ones have, in impressive detail.

It is a bad allocation because it is expensive attention. Every hour spent debugging why the booking engine stopped passing a transaction value is an hour not spent on positioning, on the guest proposition, on the commercial mix. And the debugging never ends, because the underlying platforms keep changing.

It also produces fragile setups. Tracking built incrementally by whoever was available, documented nowhere, understood by one person who has since left. We see this constantly. The tracking is not wrong exactly — it is just unaccountable, and nobody is confident enough in it to make a big decision from it.

What good looks like

The measurement layer should be someone’s actual job, with the same expectations you would apply to any other system:

• Documented. What is tracked, where it goes, what each event means, and what it does not capture.
• Tested. A change to the booking engine should not silently break attribution for six weeks.
• Owned. One party accountable for it working, not four parties each responsible for their own end.
• Honest about its limits. Stated clearly: here is what we can know, here is what we can infer, here are the gaps, here is the confidence level. Hospitality attribution is imperfect. Pretending otherwise is worse than the imperfection.

That last point matters most. The goal was never perfect certainty. It is enough confidence to make a decision, and a clear enough view of the gaps that you know which decisions the data cannot yet support.

The ask

If you are a marketing leader in hospitality currently holding the data layer together, the useful move is not to learn more. It is to name it as a function, put it in someone’s remit, and get it out of yours.

You should be briefing the commercial outcome. Not the tag manager.