Most "ecommerce KPI dashboard" guides read like they were written to hit a word count, not to help you build something. You get a list of 12 metrics you already know (revenue, AOV, conversion rate), a stock screenshot of a dashboard, and a vague line about "tracking what matters." No benchmarks. No formulas you can actually copy. No answer to the question that matters most: how do you get this running without losing half a day every Monday?