Growth hacking is a blend of marketing, data, and creativity designed to grow a business quickly and efficiently. It focuses on innovative, low-cost strategies such as virality, conversion optimization, and constant experimentation. Companies like Dropbox, Airbnb, and Spotify used it to scale rapidly. It is based on A/B testing, metrics analysis, and unconventional tactics to attract and retain users. It is not just for startups; any company looking to accelerate its growth can benefit from this mindset.