The document discusses the problems with relying on "vanity metrics" like social media followers and page views for digital marketing. It argues that vanity metrics do not provide useful information for business decisions and can be easily manipulated. Instead, marketers should focus on actionable metrics that track customer acquisition and revenue, like customer lifetime value, cost to acquire customers, and return on investment. Tracking these more meaningful metrics will provide a clearer picture of business performance and allow optimization of marketing strategies.