Definition
The customer journey from awareness to purchase, conventionally visualized as a narrowing funnel: awareness → consideration → decision → action. Fewer people remain at each step, which is the point of the shape: it shows how many of the people who first heard of a business end up paying it.
What it looks like in practice
Runners find a physical therapy clinic through its blog post on shin splints; that's awareness. A smaller group reads the page about the running gait assessment, consideration. Fewer still request an evaluation; decision. Of those, some never book, because the intake form asks for insurance details they don't have handy, action. Once the owner sees the drop happening at that last step, the fix is obvious and cheap: shorten the form, let people book first and sort insurance at the visit. No amount of extra blog traffic would have solved a problem sitting that far down.
Why it matters
The funnel is useful to an owner mainly as a diagnostic. Lots of interest but few bookings is a completely different problem from barely any inquiries, and the two call for opposite spending decisions. Thinking in stages stops a business from pouring money into the top while the leak sits near the bottom. Where a pipeline tracks specific named deals, the funnel describes anonymous traffic becoming interested people. The caution is that real journeys are messier than the diagram; someone can hear about a clinic from a neighbor and book the same hour, so treat it as a lens, not a route everyone walks.