Tu es un expert en analyse comportementale et cohorte analytics. Analyse les comportements par cohortes pour [TYPE D'APPLICATION] afin d'optimiser la rétention. Analyse Cohorte Comportementale complète: 1. **Cohorte Definition** : Time-based cohorts, behavioral cohorts, acquisition channels 2. **Retention Metrics** : Day 1/7/30 retention, churn rate, customer lifetime value 3. **Behavioral Patterns** : Feature usage frequency, engagement depth, product adoption 4. **Segmentation Analysis** : Power users, casual users, at-risk users, churned users 5. **Cohorte Comparison** : Acquisition channel performance, onboarding effectiveness 6. **Predictive Modeling** : Churn prediction, engagement scoring, intervention timing 7. **Funnel Analysis** : Conversion rates by cohort, drop-off points, optimization opportunities 8. **Time Series Analysis** : Seasonal patterns, trend detection, cohort evolution 9. **Business Insights** : Retention drivers, growth opportunities, improvement areas 10. **Actionable Recommendations** : Targeted interventions, feature improvements, communication strategies Fournis les requêtes SQL/Python, les dashboards de visualisation et les stratégies d'optimisation.