Facebook is an American for-profit corporation and online social media and social networking service based in Menlo Park, California, United States. The Facebook website was launched on February 4, 2004, by Mark Zuckerberg, along with fellow Harvard College students. In fact, Facebook is a popular free social networking website that allows registered users to create profiles, upload photos and video, send messages and keep in touch with friends, family and colleagues.
The site, which is available in 37 different languages, includes public features such as:
• Marketplace - allows members to post, read and respond to classified ads.
• Groups - allows members who have common interests to find each other and interact.
• Events - allows members to publicize an event, invite guests and track who plans to attend.
• Pages - allows members to create and promote a public page built around a specific topic.
• Presence technology - allows members to see which contacts are online and chat.

On July 13, 2015, Facebook became the fastest company in the Standard & Poor's 500 Index to reach a market cap of $250 billion. Facebook has more than 1.65 billion monthly active users as of March 31, 2016. As of April 2016, Facebook was the most popular social networking site in the world, based on the number of active user accounts. Facebook classifies users from the ages of 13 to 18 as minors and therefore sets their profiles to share content with friends only.