This document provides an introduction to growth hacking strategies. It discusses what growth hacking is, which is a data-driven approach to growing a user base through testing and optimization. It outlines the lean marketing funnel framework of acquisition, activation, retention, referral, and revenue. It also provides recommendations for setting up analytics tools to measure experiments and optimize the user experience and funnel. Finally, it discusses tactics like A/B testing, creating landing pages, and inbound marketing that are part of the growth hacking approach.