Cost Per Acquisition Definition The total cost of converting someone. Cost Per Acquisition is the ultimate metric for any marketing department because you don’t want to spend more money to convert a customer than they’re worth. “If you're spending more to acquire a customer than they're worth, you're doing marketing wrong.” Tweet This Resources Improve Your CPA to Make the Most of Your Marketing Budget Retargeting Ads That Will Bring Your Audience Back (With Examples) How To Optimize Your Landing Page For Better PPC Conversion Economics – Finding Your Customer Acquisition Sweet Spot