Web 2.0 (pronounced /Web 2 Point Oh/) is what people call new ways of showing or using things on the Internet.
Web 2.0 is considered beneficial because it is easy for people to publish their work, connect with other people, and share & exchange information.
Before Web 2.0, Internet users could just read information on web pages. With Web 2.0, users can interact with the site and add information. In Web 1.0, the previous version, information was only written by the website author.