The document discusses market segmentation, which involves dividing a market into distinct subgroups of customers with different needs, characteristics, or behaviors. It outlines the key steps in target marketing: segmenting the market, evaluating segments, and selecting segments to target. The document also discusses different bases for segmenting consumer and business markets, such as geographic, demographic, psychographic, and behavioral variables. It emphasizes that effective segmentation results in segments that are measurable, accessible, substantial, and actionable.