SSEBITDA is introduced as a refined profitability metric for SaaS companies that focuses on steady-state profitability by factoring in the costs of maintaining customer levels while excluding excessive growth-related spending. It addresses flaws in previous metrics by incorporating customer cancellation costs and offering a clearer picture of a company's fundamental profitability. Additionally, the concept of Profitable Growth Rate is derived from SSEBITDA, allowing companies to gauge sustainable growth without becoming unprofitable.