This document discusses different methods that media companies use to categorize their mass audiences. The first method is by social class status, such as working class or upper middle class, which gives insight into purchasing power. The second method is Young and Rubicam's four consumers - mainstreamers, aspires, succeeds, and reformers - which broadly categorizes people. The third method examines values, attitudes, and lifestyles to understand daily lives. The final technique is a life matrix that splits audiences into 10 categories like home soldiers or dynamic duos to target specific groups. These categorization methods help media companies better understand their target markets.