" Some companies like Airbnb and Instragram spend a long time trying new iterations until they achieve what growth hackers call Product Market Fit (PMF); others find it right away. The end goal is the same, however, and it’s to have the product and its customers in perfect sync with each other. Eric Ries, author of The Lean Startup, explains that the best way to get to Product Market Fit is by starting with a “minimum viable product” and improving it based on feedback—as opposed to what most of us do, which is to try to launch publicly with what we think is our final, perfected product. "

― Ryan Holiday , Growth Hacker Marketing: A Primer on the Future of PR, Marketing, and Advertising