All web servers track basic information about their visitors. This information includes, but is not limited to, IP addresses, browser details, timestamps and referring pages. None of this information can personally identify specific visitors to this site. The information is tracked for routine administration and maintenance purposes.
If you would like more information about this practice and to know your choices about not having this information used by these companies, you can visit Google’s Advertising and Privacy page. If you wish to opt out of Advertising companies tracking and tailoring advertisements to your surfing patterns you may do so at the Network Advertising Initiative.
Google uses the Doubleclick DART cookie to serve ads across it’s Adsense network and you can get further information regarding the DART cookie at Doubleclick as well as opt out options at Google’s Privacy Center.
Note that you can change your browser settings to disable cookies if you have privacy concerns. Disabling cookies for all sites is not recommended as it may interfere with your use of some sites. The best option is to disable or enable cookies on a per-site basis. Consult your browser documentation for instructions on how to block cookies and other tracking mechanisms.