Product-market fit is the point where a product meets real demand: people use it, come back, and pay without you chasing every one of them. It is evidence, not a line on a pitch deck.
An MVP is how you test. Fit is what you are testing for. A value proposition is the promise. Fit is whether the market agrees. An ideal customer profile and user personas guess who that market is. User research and a real conversion check the guess. SaaS teams feel fit when renewal is uneventful — people stay. A web app nobody opens twice is still an experiment.
A real-life example of product-market fit
A Midtown meal-prep service starts with a simple order form. A few nearby offices reorder every Monday without a reminder. That unprompted repeat is the signal. A pile of compliments and no second order is not. The MVP can stay plain while that pattern holds.
Watch who returns and who pays, then build the rest. How early teams look at this: startup metrics and how to test a business idea.