Facebook started in 2004 by Mark Zuckerberg at Harvard. It allows people to connect with friends and share photos, statuses, and experiences. Facebook uses languages like HTML, CSS, JavaScript, PHP, and databases like MySQL to function. It has benefited users by keeping them connected to friends and family and has become a major platform for businesses and a way for some to earn income through advertising and affiliate programs. Facebook continues developing new technologies to improve connectivity for future generations.