What Product-Market Fit Really Means

This lesson defines product-market fit as evidence that a specific market repeatedly chooses, uses, pays for, and recommends a product because it solves an important problem better than available alternatives.

Students learn why product-market fit is not a launch milestone, a founder feeling, a vanity metric, or a one-time achievement. The lesson establishes the core vocabulary for the course: market, customer segment, problem, value proposition, alternative, pull, retention, willingness to pay, and repeatable demand.

By the end, students should be able to describe product-market fit in operational terms, recognize weak signals that are often mistaken for fit, and explain why fit must be found, measured, and protected over time.