You have users. You have revenue. Growth looks reasonable on a slide deck. But every new customer requires heavy onboarding support. The sales cycle takes months. Marketing spend keeps climbing but conversion rates do not. Everything feels harder than it should be. You might be growing, but you do not have product-market fit. And without it, growth will eventually stall or collapse.
Product-market fit is the moment when your product satisfies a strong market demand so clearly that the market starts pulling you forward. Users seek you out. Word spreads organically. Growth accelerates with less effort, not more. It is the single most important milestone in a product's life, and most products never reach it, or worse, think they have it when they do not.
The Core Idea
Product-market fit means being in a good market with a product that can satisfy that market. The concept, popularised by Marc Andreessen, is deceptively simple. But the implications are profound. Before product-market fit, everything is hard: acquiring users, retaining them, generating revenue, hiring. After product-market fit, things get easier because the market itself creates demand. Users tell other users. Prospects find you instead of you finding them. Support questions shift from 'how does this work?' to 'can you add more features?'