The DoubleClick cookie is used by Google in the ads served on the websites of its partners, such as websites displaying AdSense ads or participating in Google certified ad networks. When users visit a partner's website and either view or click on an ad, a cookie may be dropped on that end user's browser.

Third party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website. Google's use of the DoubleClick cookie enables it and its partners to serve ads to users based on their visit to this site and/or other sites on the Internet. Users may opt out of the use of the DoubleClick cookie for interest-based advertising by visiting Ads Settings.