Google will let people choose how its ads target them

Google plans to target online advertisements based on the sites people visit, not just the searches they make or the site on which the ad appears, it said Wednesday. It will also allow people to define the interest categories for which they would like to receive ads.

In a beta test of the new service, Google will show ads on YouTube and on the sites of its partners, allowing advertisers to target surfers in broad interest categories such as sports, gardening, cars or pets, Vice President of Product Management Susan Wojcicki wrote in a post entitled "Making ads more interesting" on the Official Google Blog.

Google currently targets advertising at surfers in one of two ways: either based on the keywords they look for using its search engine, or based on the content of Web pages they visit on the sites of partners enrolled in its AdSense program. Ads targeted in this way can only reflect surfers interests at the moment the ads are displayed, whereas the new system will allow targeted ads to be displayed on unrelated sites or in response to unrelated searches. For example, a surfer identified as interested in running might be shown ads for new shoes even when visiting a site about cooking recipes, or when conducting a search about airfares.

"Tailored advertising does raise questions about user choice and privacy," wrote Wojcicki -- but Google is not the first to raise such questions, she said. "Many companies already provide interest-based advertising and they address these issues in different ways."

The U.S. Federal Trade Commission published a report on interest-based or behavioral advertising last month, reiterating guidelines it issued in December 2007. Those guidelines include requirements that Web sites provide clear notice about behavioral advertising, and allow consumers to choose whether to have their information collected.

Companies with online advertising businesses, including Google and its search rivals Microsoft and Yahoo, backed a similar set of behavioral advertising guidelines issued by the U.K.'s Internet Advertising Bureau earlier this month.

Google will allow surfers to view, delete or add the interest categories associated with their browser, and will identify the information used to serve up a greater number of the ads displayed on YouTube and on the sites of its AdSense partners, Wojcicki wrote. Google already identifies this information for some, but not all, of the ads it distributes.

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