The e-commerce landscape is undergoing a fundamental shift, moving from an acquisition-centric to a retention-focused paradigm. Driven by skyrocketing customer acquisition costs (CAC) (up 60-222% recently, with some verticals seeing 222% increase over a decade) and the emergence of agentic commerce where AI agents will curate product discovery, customer retention has become the "defining competitive advantage for successful DTC brands in 2024-2025." A mere 5% increase in customer retention can drive 25-95% profit growth, demonstrating the overwhelming economic case for this strategic pivot. Companies prioritizing retention-focused AI initiatives are projected to achieve 25% higher revenue within five years, aiming for a 4:1 to 5:1 LTV:CAC ratio. This podcast outlines the critical economic drivers, the transformative impact of agentic commerce, key strategies for measuring and improving Lifetime Value (LTV) and churn, and actionable steps for DTC brands to thrive in this new retention-first economy.