Lead Cost Per Acquisition (CPA) is the total marketing expense required to generate a single lead. This metric is critical for evaluating the profitability and efficiency of lead generation campaigns. Businesses calculate CPA by dividing total marketing spend by the number of leads acquired within a given period. Lowering CPA involves optimizing ad targeting, improving conversion rates, and refining audience segmentation. CRM and analytics tools help track CPA and allocate budgets effectively. A well-managed CPA strategy ensures sustainable growth and higher ROI.