Facebook is a social networking site that lets users post comments, chat live, share photographs and post links to news or other interesting content on the Internet.
Twitter is a microblogging site that uses short messages called tweets to communicate with people about news and other interesting content.
You can use LinkedIn to connect and strengthen your professional relationships, find a job or internship and learn many skills you may need to succeed in your career.
Pinterest is a social media and image sharing service made for sharing images and information on the internet. Pictures of interest can be pinned on your board and shared with others.