The document discusses market segmentation, targeting, and positioning. It lists common segmentation variables like gender, age, income, social class, and lifestyle. It provides examples of how companies segment by age, gender, and income level. For age, it discusses diversifying products, pricing, and features for different age groups. For gender, it discusses creating segments and tailored marketing for males vs females. For income, it discusses considering different income levels when setting prices. Social class and lifestyle segmentation are also briefly explained. The document suggests that when choosing a segment to aim for, companies should consider market leaders that have established reputation, visibility, and customer comfort with their brand.