<slide_break></slide_break> ## Takeaways from Chapter 7 - Measure * **Big Idea**: Engine of growth * Startup needs to measure (the right things) * Actionable Metrics (vs. vanity metrics) * Baseline -> Change something -> Measure change * Growth engine: The things the startup does or has that it believes will lead to growth * Cohort Analysis: Partition your user/customer base into cohorts based on time * A/B Test: give different "treatments" to different groups and measure how they react