Representation is the portrayal of someone or something in a particular way. The document discusses representation of gender, ethnicity, age, race, and disability in media. It provides examples of how each of these groups are commonly stereotyped - for instance, females are often portrayed as weaker than males, ethnic minorities are negatively stereotyped, and the disabled are sometimes shown as pitiable or laughable. However, the representation of some groups like the disabled is improving, with some shows and brands providing more positive portrayals and roles for people of diverse backgrounds.