Facebook, the popular social networking site, lets users add friends, send them messages, and update their personal profiles to notify friends about themselves. Additionally, users can join networks organized by city, workplace, school, and region.
Facebook has a number of features with which users may interact. They include the Wall, a space on every user's profile page that allows friends to post messages for the user to see; Pokes, which allows users to send a virtual "poke" to each other (a notification that tells a user that they have been poked); Photos, where users can upload albums and photos; and Status, which allows users to inform their friends of their whereabouts and actions.
Users control what types of information are shared automatically with friends. Users are now able to prevent friends from seeing updates about certain types of activities, including profile changes, Wall posts, and newly added friends.
Facebook has a blogging feature that allows tags and embeddable images, or users can import their blogs from other blogging services. There is also a chat feature similar in functionality to desktop-based instant messengers.