MINNEAPOLIS - Facebook is now sharing your personal profile information with third parties. For now, it's just a few web sites, like the music site Pandora, and the consumer review site, Yelp.

Facebook is automatically sharing that information, without your consent. If you don't want to share, you have to opt out.

University of Minnesota law professor and privacy expert Bill McGevern says it's an important line in the sand. And for Facebook, with 600 million users, the stakes are high.

“Facebook is trying over and over to get this shared so Facebook becomes the center of the web,” said McGevern.

Facebook want to make money by selling user information.