What is product-market fit?

While the term “product-market fit” gets thrown around a lot in the startup world, it’s not always very well understood. In fact, we can’t even agree on who created it! Some people say that the concept of product-market fit was first developed and named by entrepreneur and investor Andy Rachleff. Others give credit to famed investor Marc Andreessen, who at the very least popularized term product-market fit when he wrote about in a 2007 blog post. He said, “Product-market fit means being in a good market with a product that can satisfy that market.”

In other words: You could have an amazing, sophisticated, well-thought out idea — and people just don’t get it. (Think: That first focus group for Pied Piper on HBO’s ...