In this chapter, you will learn what growth hacking is, when you should start with growth hacking, and how to implement a growth hacking process in your start-up. We define growth hacking as a creative, resourceful approach that uses innovative strategies to expand your customer base and increase sales. Differentiating between the early experimentation phase and the subsequent scaling phase of a start-up, we emphasize the necessity of achieving product/market fit before focusing on scaling. We then provide practical advice on creating growth equations to align activities with growth goals and offer a step-by-step framework to conduct growth hacking and iterate through growth initiatives. We offer advice for immediate action.