Cost per acquisition (CPA) is a marketing metric that measures the total cost incurred by a company to acquire a new customer or lead. It takes into account all the expenses associated with acquiring a customer, such as advertising costs, sales commissions, and other marketing expenses. CPA is an important measure for businesses as it helps them understand the effectiveness of their marketing campaigns and the return on investment (ROI) for each customer acquired. A lower CPA indicates a more efficient and cost-effective marketing strategy, while a higher CPA may suggest the need for adjustments to improve the acquisition process. Ultimately, the goal of CPA is to minimize the cost of acquiring new customers and maximize the profitability of each customer.