Cost Per Action (CPA) on 7Search PPC is an advertising model where advertisers pay when a user takes a specific action, such as making a purchase, filling out a form, or signing up for a service. Unlike CPC, where advertisers pay for clicks, CPA focuses on paying only when a desired conversion occurs. This performance-based approach helps businesses optimize their ad spend by paying for actual results, making it a more targeted and cost-effective strategy for driving meaningful user engagement.