To effectively target an advertising campaign, you must properly define and classify the intended audience. There are three main methods to classify audiences: demographic profiles based on attributes like age, gender, and location; psychographic profiles based on attitudes and lifestyles; and lifestyle subsets that describe specific subcultures. Demographic profiles were commonly used in the 1950s while psychographic profiles focusing on personality types became more popular in the 1960s. By the 1980s, lifestyle subsets emerged to define distinctive groups like goths, emos, and fanbases.