A measurement of the user-initiated action of responding to (such as clicking on) an ad element causing a re-direct to another Web location or another frame or page within the advertisement. There are three types of ad clicks: 1) click-throughs; 2) in-unit clicks; and 3) mouseovers.
A click on an advertisement which takes a visitor to another web site.
the act of click on an ad. Usually after clicking the user is redirected to the advertiser's web site.