This document discusses how to monitor and measure engagement across different stages of the customer journey: acquisition, activation, retention, referral, and revenue. It recommends defining both qualitative and quantitative goals and key performance indicators (KPIs) tailored to your business. Examples of qualitative metrics include loyalty, trust, and satisfaction, while quantitative metrics include sales, leads, and referrals. The document also provides examples of tools to measure engagement and a sample measurement scorecard to allocate budgets based on conversion rates and estimated customer lifetime value at each stage.