The document discusses various types of biases that can occur in news media representations, including selection bias in the stories that are covered, concision bias in simplifying complex issues, and presentation bias in favoring one interpretation. It notes that biases are shown through the angle and framing of stories and that repeated representations of certain groups can lead to stereotypes. While news media are meant to be impartial, biases can be challenged by user-generated content and citizen journalism, though these may also have their own biases.