It’s easy to tell when you don’t have product-market fit: No one’s buying what you’re selling. What’s trickier is when founders “hallucinate” product-market fit—mistaking early sales growth for true PMF. Getting customers is crucial, but there are more important things to measure before you declare “mission accomplished” on product-market fit. In this episode, Steli shares the most common mistakes startups make when measuring product-market fit.