When a metric moves after a launch, it's tempting to credit the launch. But the users who adopt new features first are often your most engaged users regardless. Mixpanel's Impact report uses causal inference to compare adopters with a matched group of non-adopters, giving you a fairer picture of what your launch actually caused. The Impact module covers how it works, how to define your hypothesis, how to read the before-vs-after timeline, and how to use results to guide rollout decisions.