This document discusses growth hacking, which involves experiment-driven marketing techniques focused on product usage to drive growth. It provides examples of growth hacking techniques used by companies like Dropbox, Buffer, PayPal, and Twitter to increase user acquisition, activation, retention, and revenue. The document also outlines a sample growth hacking problem-solving process addressing a common challenge of low conversion rates. This involves defining growth hacking areas and goals, approaches, techniques, skills needed, and metrics to measure success. Finally, it notes that companies now offer growth hacking as a service to help other businesses implement these strategies.