Facebook, Inc. is a social networking service and website. It aims to make the world more open and connected. People use Facebook to stay connected with their friends and family, to discover what is going on in the world around them, and to share and express what matters to them to the people they care about. Developers can use the Facebook Platform to build applications (apps) and websites that integrate with Facebook to reach its global network of users and to build products that are more personalized, social, and engaging. The company offers advertisers a unique combination of reach, relevance, social context, and engagement to enhance the value of their ads. Its services include timeline, news feed, messages, lists, ticker and mobile apps. Facebook was founded by Mark Elliot Zuckerberg, Dustin Moskovitz, Chris R. Hughes and Eduardo Saverin on February 4, 2004 and is headquartered in Menlo Park, CA.