Summary Box: Facebook unveils new ads

NEW AD OPPORTUNITIES: Brands you’ve endorsed by hitting the “like” button on Facebook will now be able to push deals and other updates right into the news feeds that show your friends’ updates, photos and links. These marketing messages could also show up if a friend has interacted with a brand.

ON THE GO: Advertisers can use this to reach users on mobile devices for the first time.

THE BACKDROP: An upcoming initial public offering of stock could value Facebook at up to $100 billion. That means Facebook has to prove it can bring in real advertising revenue from brands.