Eric Reis' "The Lean Startup" covers this topic in detail, and makes a useful distinction between "vanity" metrics and "actionable" metrics. Aside from the book

Eric Reis' "The Lean Startup" covers this topic in detail, and makes a useful distinction between "vanity" metrics and "actionable" metrics. Aside from the book, you can read a blog post by him on the subject of metrics here: https://tim.blog/2009/05/19/vanity-metrics-vs-actionable-metrics/ https://tim.blog/2009/05/19/vanity-metrics-vs-actionable-met...