Many teams can measure what happened — but can't see why it happened or which levers actually move the needle. Metric Trees solve this by making your business logic explicit: connecting Focus metrics (your North Star), Driver metrics (what influences it), and Input metrics (what teams directly control). The Metric Trees module covers why they matter, how to build one in Mixpanel using data connections, formulas, and context, and how to use it for root-cause analysis and prioritization.