Godin frames strategy as four choices. Your customers. Your competition. Your source of validation. Your distribution. His claim is that product people gloss over all four. They inherit them by default, then wonder why the roadmap reads like someone else wrote it. The first choice carries the other three. Name who this is for. You have also named your competition. You have named whose taste you are matching. You have named where you have to sell it.
The smallest viable audience inverts the reflex question. Not how many people can we reach, but what is the fewest we can serve so well that they would notice if we stopped. Answer that and the group stops being a marketing target. It starts behaving like a spec. What they can afford. What they already believe. How technical they are. How patient they are. Each is now a product constraint, not a research slide.
Godin reads the spec out loud.
His failure case is a product that dressed for one audience and shipped to another. The Humane pin arrived looking like a finished, Apple-quality device. The people who buy finished, Apple-quality devices pre-ordered it. When what shipped was not that, the audience had already decided. Put the same rough build in front of four hundred Product Hunt tinkerers who like Raspberry Pi and want to wonk with it. Nothing about the object has changed. Only the audience. That is the argument: the audience decides what counts as good.