What is product-market fit?

Why it matters

Product-market fit is the line between a business that pulls and one you have to push. Before it, every sale is hard, retention leaks, and you are constantly tweaking, guessing why people are not sticking. After it, demand outpaces what you can build, and the work shifts from "will anyone want this?" to "how do we keep up?" Almost everything else, fundraising, hiring, polish, is easier on the far side of that line, and brutally hard before it. So the first job of an early company is not to scale. It is to find fit.

How you know you have it

There is no single dial, but the signs are consistent: people use the product without being chased, they come back, they pay, and they recommend it to others unprompted. A common gut-check is asking users how they would feel if the product disappeared, and a meaningful share say "very disappointed." Weak fit looks like polite interest that never turns into habit or money. Strong fit feels, famously, like the market is pulling the product out of your hands.

Why an MVP is how you look for it

You cannot reason your way to product-market fit from a whiteboard. You have to put something real in front of real users and watch what they actually do. That is what an MVP is for: the smallest honest version of the product that can prove or kill the idea, built with the least time and code, so you learn the truth fast. The trap is scope creep, piling on features in the hope that the next one finally creates fit, when the disciplined move is to ship the core, measure, and let real demand tell you where to go next.