Cost per click (CPC) is a pricing model primarily used in online advertising, where the advertiser is charged each time a user clicks on an ad, banner, or video ad. This billing method is commonly used on search engines, through platforms like Google Ads, as well as on partner site networks. CPC can also be used in other areas of digital marketing, such as email campaigns or targeted promotions. On average, the click-through rate (CTR) observed in these types of campaigns is around 0.5%, or approximately 5 clicks per 1,000 impressions.