Cohort Analysis

Summary

Grouping users by a shared starting point (e.g. signup week) and tracking their behavior over time — the standard way to see whether retention is actually improving, not just growth masking churn.

• 1Sketch a cohort retention table (weeks since signup vs % still active) by hand.
• 2Learn why raw user-count growth can hide a serious retention problem.
• 3Compare cohorts from different acquisition channels and reason about why they'd differ.