Growth marketing focuses on rapidly and sustainably growing a user base through tactics that improve the customer experience rather than just acquiring users. It involves collecting user data from online sources to understand customer wants and how to effectively engage them. Growth marketing automation tools analyze this data to find the best customer segments to target, build custom lists, test different marketing messages, and scale outreach while continuously optimizing based on results. The goal is acquiring the right users and engaging in a way that makes their lives better to fuel loyal, long-term growth.