When users visit any Web site, their computer exchanges data with remote servers hosting the site. In doing so, sites may anonymously track user activity, including time spent viewing a page, what links were clicked, etc. This allows sites to tailor advertising and even content they believe suits their users best.
Some legislators have introduced broad online privacy laws that do not distinguish between sensitive financial or medical data and other benign data, such as saving a mailing address in order to expedite future purchases.
Last Updated: August 2007