CPC, or Cost Per Click, is a digital advertising model where advertisers pay a fee each time a user clicks on their ad. This model is commonly used in online platforms like Google Ads and Facebook Ads, allowing businesses to drive traffic to their websites. The cost can vary based on factors such as competition, keywords, and the target audience. Advertisers often set a budget for their CPC campaigns, aiming to maximize their return on investment. By analyzing metrics like click-through rates and conversion rates, businesses can optimize their ads to achieve better performance and lower costs over time.