Facebook is a social networking website launched in February 2004 that is operated and privately owned by Facebook, Inc., with more than 500 million active users in July 2010. Users can add people as friends and send them messages, and update their personal profiles to notify friends about themselves. Additionally, users can join networks organized by workplace, school, or college. The website's name stems from the colloquial name of books given to students at the start of the academic year by university administrations in the US with the intention of helping students to get to know each other better. Facebook allows anyone who declares themselves to be aged 13 or older to become a member of the website.

Facebook Apps are games, surveys, and other third-party software embedded (or hosted) within the Facebook website.

This SonicWALL signature identifies access to a version of this app as hosted on Facebook. Use this signature to identify Zynga Poker.