Web 2.0 refers to websites that allow users to actively participate by sharing, commenting on, and adding their own content, rather than just passively consuming information from publishers. Journalists need to adapt to this changing landscape where news has become a conversation rather than a one-way lecture, by participating in social media sites and embracing the interactive and collaborative nature of Web 2.0 where users can freely share and build on published content. Popular examples of early Web 2.0 sites that demonstrated this model include Flickr, Del.icio.us, Digg, Wikipedia, Twitter, and YouTube.