Using so-called browser cookies, advertisers can track a given Web surfers' habits and serve them relevant ads.
This election year, a related type of targeted ads-one relying on "political cookies"-is coming into widespread use.
With the help of advertising exchanges and media partners, a political campaign can use cookies to serve specific ads
Most major campaigns this year will use cookie-based political advertising, says John Phillips, CEO of Aristotle International, which sells voter records combined with information like people's hobbies and income brackets.
