"Pixels" or "web beacons" are lines of code used by a website or third-party ad server to cause a cookie to track a user's activity on particular sites and/or using particular advertising/links, for example, to record that a user has visited a particular webpage or viewed a particular email, and to collect other information about that user on that site, including the IP address of the computer (and therefore infer information, such as geolocation (which may include specific longitude and latitude)), web pages being viewed, date/time viewed, and user activity on a particular page.</li> </ul>  .