Facebook has advertisements right now, down the sides of its website, as well as mobile apps - but now the social networking site will push ads on other handset-optimized websites and smartphone apps.
It has been reported by TechCrunch that Facebook have entered into beta testing of a new ad network that uses user data to display hyper-relevant ads on third-party territory. Normally they would rely on normal tracking cookies to get info on visitors' interests, but this platform scoops up information such as age, gender, likes, location, which apps your friends have used and other data points that get taken when a user logs into a site, or application with their Facebook credentials.
Facebook's new mobile ad solution lets advertisers bid on certain demographics, and uses existing networks like iAds and AdMob to push out appropriate ads based on anonymous ID's linked to Facebook accounts. Right now, Facebook are only pushing these ads to the mobile market, but don't be surprised if you see them hit your monitor in the near future.