Web-based social networking site that brings together internet users who share the same interests. With over 200 million members, it’s one of the most influential social networks. At the outset, this was designed as a platform to allow internet users to showcase their original images, music or video work, by creating their personal page. Membership is free; you just need to register. This is the most international of the networks (it’s available in several languages), with half its users living in the USA.