Judge creative on profit, not clicks.

Creative testing is the practice of running ad creatives against each other under controlled conditions so you can tell which ones actually perform, rather than which ones happened to run during a good week. Done properly it isolates the creative variable — same audience, same budget logic, same window — and measures the result on profit rather than surface engagement.

Fatigue shows up as declining performance at stable spend and frequency creeping up while conversion rate falls. The trap is that blended ROAS often hides it, because a strong new asset masks several decaying ones. Dema tracks performance per asset over its lifetime, so the decay is visible at the level where you can act on it — swapping one creative rather than pausing a whole campaign.

A clear hypothesis per test, one variable at a time, a decision rule agreed before the test runs, and a minimum sample defined up front. The part most teams skip is the decision rule: without one, results get interpreted after the fact to support whatever was already planned.

ROAS tells you revenue per unit of spend, which means two creatives can post identical ROAS while one sells high-margin products customers keep and the other sells low-margin products that come back. Dema evaluates creative on contribution margin, so the winner is the asset that actually made money.

Yes. Dema can generate on-brand assets guided by your brand style and real product data, and analyse performance by format, asset, and audience. The measurement side is what tells you which generated assets are worth scaling.