The document discusses urban intervention and tactical media art. It provides examples of artists who use public spaces and media to raise awareness of social and political issues. These include the Red Ball Project, which placed giant red balls in cities, and The Yes Men, who create fake news stories to draw attention to important topics. The document also discusses influential groups like the Situationists who created experimental art experiences in public settings and the rise of tactical media in the 1990s which allowed users to more easily spread messages through mainstream outlets.