The article discusses online journalistic media formats with an emphasis on blogs. It asserts that the Internet has expanded the ways in which people can participate in journalism. Blogs, wikis, online social networks, forums, chat rooms, instant messaging, and news groups represent what has come to be known as social media, the article says. Social media have led to so-called citizen or participatory journalism, in which the power of public communication, circulation of information, and the setting of agendas has been devolved from traditional media entities to citizens, the article adds. Blogs as a journalistic medium are examined in detail.