This document summarizes a presentation from Jennifer Day on how to become a more data-driven marketer. The presentation took place at a digital marketing event powered by BrightEdge. Day discussed how data-driven marketers see nearly 10% improvement in marketing-driven sales and customer retention compared to average. However, becoming data-driven can be difficult because of reliance on opinions rather than data. Day provided advice on how to overcome this, including choosing the right metrics, keeping data visualizations simple, and enabling drill-down into exceptions to find important insights. The overall message was on the importance of using data and analytics to guide marketing strategies and decisions.