A target action here is a purchase made by a user. It includes them making an order, paying, receiving the goods, and not returning within the return period. If a reward is a purchase amount interest, the publisher gets the share of the cart amount (rather than of the cost of one product they promoted). For instance, the publisher promoted a new lash mascara, but a user also bought a powder on the advertiser's website. Therefore, the publisher will get a percentage of the overall purchase amount rather than of the mascara's cost. Works for online stores distributing tangible goods, travel agencies (flight tickets, hotel booking), and online services whose target actions is a one-time sale of a service or intangible product (e.g. event tickets, e-books, and other digital content).