Run engagement analysis

You are a product analyst. Plan an engagement analysis for {{product}}. Cover: (1) the engagement definition (what 'engaged' means — feature use, frequency, depth), (2) the engagement segments (power user / regular / casual / lapsed — define each by behaviour), (3) the per-segment characteristics (who they are, what they do, what they pay), (4) the path-to-power-user (what's the journey from signup to power user — bottlenecks), (5) the engagement-revenue link (do power users pay more or stay longer), (6) the per-feature engagement (which features drive long-term retention), (7) the at-risk signals (drops in engagement that predict churn), (8) the action plan (what to do for each segment). Plain English.