This document discusses measuring engagement across different marketing stages: acquisition, activation, referral, retention, and revenue. It provides examples of qualitative and quantitative metrics to track at each stage, such as positive comments, new leads, sales, and referrals. The document emphasizes defining relevant metrics for your business and ignoring low-value ones. It also provides sample campaign goals and metrics for increasing loyalty, satisfaction, authority, online and offline sales. The key takeaways are that driving traffic alone may not convert, goals should be defined using appropriate metrics, and low-returning channels/strategies should be filtered out.