Facebook is a website which allows users, who sign-up for free profiles, to connect with friends, work colleagues or people they don't know, online. It allows users to share pictures, music, videos, and articles, as well as their own thoughts and opinions with however many people they like .Facebook is also a social media networking site that allows users to connect with friends, family, co-workers, and others, including groups of people who share a similar interest. Users can share pictures, videos, articles and opinions with their friends.