The millions of people who use their cellphones daily to play games, download applications and browse the Web may not realize that they have an unseen companion: advertisers that can track their interests, their habits and even their location.
Smartphones, like the iPhone and BlackBerry Curve, are the latest and potentially most extensive way for advertisers to aim ads at certain consumers. Advertisers already tailor ads for small groups of consumers on the Web based on personal information. But cellphones have a much higher potential for personalized advertising, especially when they use applications like Yelp or Urbanspoon with GPS to identify a person’s location, right down to the street corner where they are standing.
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