Actions are cost effective campaigns where payment is the most important payment is the goal}. Entity Pay for effect , and may be Customer redirect to web or the contact form or purchase a product or a service. Purchaser may pay according to the following payment models: - CPC - cost per click - and the advertiser pays the advertising agency for such a click. ; CPA - cost per action - charge depends on the purchase of a product or sign up on the site, that is, created . touche perdue