12 Thoughtful Approaches to Product Market Fit from Andreesen Horowitz

Defining what product market fit actually is, the process to finding it, and how to tell if you have it. Common misconceptions about product market fit - and how to start figuring it out. Too many founders think they have found it, when looking at the data from customers, competition, and other factors can show that it is simply not the case.

https://a16z.com/2017/02/18/12-things-about-product-market-fit/