Click or Click-Through

The measurement of a user-initiated action on an ad element (advertisement), usually causing an HTTP 302 redirect to another web location, thereby transferring the user from a publisher site to an advertiser site. Additionally, internet-based search activity or shopping activity can lead to click-through transactions on search results or other content sites that display ad impressions, which similarly can result in redirects to other web locations, such as an advertiser site. These measurements should be filtered for click counting purposes for robotic activity and invalid click activity in accordance with the provisions of this guideline.