This document discusses the importance of metrics for businesses and provides examples of different types of metrics. It covers: - Why businesses need metrics to monitor health, make decisions, and set focus. - Examples of business, product, and marketing metrics like revenue, daily/monthly active users, click-through rate, cost-per-click. - How to establish success formulas using metrics at the business, product, and marketing levels. - The concept of a metric framework to define key events, tactics to drive those events, and metrics to measure performance for an AARRR strategy. - Important early stage metrics like retention rates and cohort analysis, as well as the idea of a "North