You cannot optimise your way to infinite demand

Performance marketing can become remarkably efficient at harvesting existing demand. The difficulty is that no amount of optimisation can create an unlimited supply of people who currently need the category.

Efficiency eventually hits a ceiling

A business discovers that search advertising works. It improves landing pages, tightens targeting and increases spend. Customer acquisition remains healthy, so the budget grows again. For a while, more investment produces more sales and the numbers look excellent.

Eventually the easiest demand has been reached. Competitors bid for the same searches, marginal customers become more expensive and incremental spend produces weaker returns. The company responds by optimising harder, which can still help, but the underlying pool of current buyers remains finite.

Future demand is a different job

James Hurman's Future Demand makes this tension explicit. A company can become excellent at converting people who are ready today while underinvesting in the much larger population of buyers who will enter the market later. When those people eventually need the category, the brands already in memory enjoy a structural advantage.

That is why brand building should not be treated as the opposite of performance. One creates and refreshes memory among future buyers; the other makes it easier to convert demand when the moment arrives. Both are part of a healthy growth system.

Optimise the system, not only the ad

The practical implication is to broaden what optimisation means. Improving cost per click is useful, but so is improving recognition, distribution, customer experience and the probability of being considered in future buying situations. Growth cannot come indefinitely from squeezing the same small group of current buyers more efficiently.

At some point, the business needs more people to know it, remember it and find it easy to buy. The next growth lever may therefore sit outside the performance dashboard that currently looks most impressive.