Facebook is one of the most popular and well-known social networking sites worldwide. Other major sites include Twitter, Linkedin, Google+, Instagram and Pinterest. These sites have millions of active members from all over the world.
Social networking sites like Facebook, Google+ and Twitter are a good way to keep in touch with family and friends, make new ones and share general ideas or opinions. They also offer online file-sharing features and private messaging services.
Other online networking sites can be more specialized and focus on different objectives. Pinterest, Instagram and Flickr, for example, allow users to share images and are a favourite virtual hub for photography lovers. YouTube users can watch both professional or amateur videos from around the world, or upload their own content.