Cost per Action (Acquisition)

The cost per action of a potential customer touching a product. The metric is related to marketing, and determines the money spent by a business to make a potential customer aware of the product. 

For example, for an online business, it is the price of one potential customer clicking on an advertisement to the product's website. For offline store is the price of one informing a potential customer with the help of advertising (television, radio, outdoor advertising). 

It is important to understand that in a general sense in unit economics, under CPA is understood the very first contact with the product by a potential customer. That is, if he clicked on an advertisement several times, we take into account the very first click.