This document discusses different methods used to define target audiences, including demographic profiling, psychographic profiling, and lifestyle groupings. Demographic profiling divides audiences based on attributes like age, gender, socioeconomic status, etc. Psychographic profiling focuses more on individual personality, emotions, and needs. Advertisers have used systems like Maslow's hierarchy of needs and Young and Rubicam's four C's (Mainstreamers, Aspirers, Succeeders, Reformers) to segment audiences based on their motivations and goals. Defining target audiences allows media producers to tailor their messages more effectively.