This episode introduces PSM (Profitable Scaling Margin) as a more reliable indicator of business success than ROAS (Return on Ad Spend). PSM considers LTV (Lifetime Value), CPA (Customer Acquisition Cost), COGS (Cost of Goods Sold), and the number of purchases. The key to sustainable business growth is to focus on PSM, beyond short-term profits, and make informed decisions about customer acquisition and scaling strategies. Profitable Scaling Margin indicates the true customer value rather than superficial metrics.