"We may also use web beacons (which are also known as pixel tags and clear GIFs) on our Sites and in our HTML formatted emails to track the actions of users on our Sites and interactions with our emails. Unlike cookies, which are stored on the hard drive of your computer or mobile device by a website, pixel tags are embedded invisibly on webpages or within HTML formatted emails. Pixel tags are used to demonstrate that a webpage was accessed or that certain content was viewed, typically to measure the success of our marketing campaigns or engagement with our emails and to compile statistics about usage of the Sites, so that we can manage our content more effectively."