Members of the booming social network Web sites treat their individual profile pages as a creative canvas for personal expression, the New York Times reports.

The social networking companies see those pages as a lush target for advertisers , if only they could customize the ads. Although Internet companies have talked about specifically aiming their ads since the inception of the Web, so far advertising on social networks has been characterized by mass-marketed pitches for mortgages and online dating sites.

But MySpace, the Web’s largest social network and one of the most trafficked sites on the Internet, says that after experimenting with technology over the last six months it can tailor ads to the personal information that its 110 million active users leave on their profile pages.

Executives at Fox Interactive Media, the News Corporation unit that owns MySpace, will begin speaking about the results of that program this week. They say the tailoring technology has improved the likelihood that members will click on an ad by 80 percent on average.

“We are blessed with a phenomenal amount of information about the likes, dislikes and life’s passions of our users,” said Peter Levinsohn, president of Fox Interactive Media, who will talk about the program at an address to investors and analysts at a Merrill Lynch conference in Los Angeles on Tuesday. “We have an opportunity to provide advertisers with a completely new paradigm.”

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