This document discusses market segmentation and the bases for segmenting consumer and business markets. It defines market segmentation as dividing a market into homogeneous groups based on factors like wants, resources, locations, and buying practices. Criteria for selecting market segments include being measurable, accessible, durable, substantial, and having unique needs. Consumer markets can be segmented geographically, demographically, psychographically, and behaviorally based on variables like age, income, interests, usage, and more. Business markets can also be segmented using these variables but also consider factors like company size, industry, purchasing approaches, product usage, and location.