CR (Conversion Rate)
Conversion Rate – the ratio of the number of users of the site to the number of users who performed the target action (subscribed, made a purchase, filled out a form). Quite often this term is used in contextual advertising.
(Cost per click) or CPC is the amount paid by an advertiser when an advertisement is clicked on. The fee is charged for each click on an advertisement that led one user to the site. Quite often this term is used in contextual advertising.
A piece of data that is transferred from the site to the browser and used to remember information about your visits and actions on the site. During subsequent visits to the site facilitate the work with it, because some of the data is already stored in the memory of your device. Quite often this term is used when promoting a website.