Business Metrics & KPIs covers the numbers business owners actually track to know whether the business is healthy and growing. Every metric here answers a specific operational question: how much it costs to win a customer (Customer Acquisition Cost), how much that customer is worth over time (Customer Lifetime Value), how predictable your revenue is month to month (Monthly and Annual Recurring Revenue), whether you're growing faster or slower than you were (month-over-month, year-over-year). The category is written for owners who want a working understanding of what these metrics measure, when they're useful, and where they can mislead you. Each article explains the formula plainly, walks through a worked example with realistic numbers, and flags the most common ways the metric gets misread. We also call out which metrics matter for which business models - a product business and a subscription business shouldn't be tracking the same dashboard. By the end you'll know which KPIs (Key Performance Indicators) to put in front of yourself every week, which ones to revisit quarterly, and which ones the internet talks about that you can safely ignore for your stage. Read alongside Financial Fundamentals if any of the underlying terms (revenue, gross margin, retention) feel new.