Users can add other users as "friends", exchange messages, post status updates, share photos, videos and links, use various software applications ("apps"), and receive notifications of activity.
Additionally, users may join common-interest user groups organized by workplace, school, hobbies or other topics, and categorize their friends into lists such as "People From Work" or "Close Friends".
A company representative called the milestone a "quiet revolution." In November 2010, based on Second Market Inc.
(an exchange for privately held companies' shares), Facebook's value was $41 billion.
In late 2007, Facebook had 100,000 business pages (pages which allowed companies to promote themselves and attract customers).
These started as group pages, but a new concept called company pages was planned.
The company had slightly surpassed e Bay to become the third largest American web company after Google and