You need to be familiar with Web 2.0.
Web 2.0 isn’t a technology it’s a term used to describe the use of the web as a collaborative medium. Imagine the World Wide Web as a place where we can all have a conversation.
Traditional media, books, newspapers, magazines, radio and television are passive mediums. “Consumers” sit passively and consume the content that they are served by a “provider.” That means you don’t control what you hear on the radio unless you pay for your content to be broadcast.
Social media is a direct result of web technology development based on Web 2.0 theory. The new electronic social media is a free sharing of information or simply the opportunity to have a conversation with anyone and everyone on the web.