DoubleClick is a subsidiary of Google that develops and provides Internet ad serving services. Its clients include agencies, marketers (Universal McCann Interactive, AKQA etc.) and publishers who serve customers like Microsoft, General Motors, Coca-Cola, Motorola, L'Oréal, Palm, Inc., Visa USA, Nike, Carlsberg among others. DoubleClick's headquarters are in New York City, United States.
Criticism
DoubleClick is often linked with the controversy over spyware because browser HTTP cookies are set to track users as they travel from website to website and record what commercial advertisements they view and select while browsing.[6] DoubleClick is considered to be malware by several commercial organizations (Adaware, Symantec, Spybot) which detect it and provide the tools to block/remove it.
DoubleClick has also been criticized for misleading users by offering an opt-out option that is insufficiently effective. According to a San Francisco IT consulting group, although the opt-out option affects cookies, DoubleClick does not allow users to opt out of IP address-based tracking.
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