This document discusses different levels and bases for market segmentation. It begins by explaining mass marketing versus more targeted micro-marketing approaches. There are four levels of micro-marketing: segment marketing, niche marketing, local marketing, and customerization. Segment marketing involves dividing the market into groups that share needs and wants. Niche marketing focuses on small, distinct customer subgroups. Local marketing tailors programs to local customer groups. Customerization involves segments of one. The document then covers demographic, psychographic, and behavioral bases for segmenting consumer markets. It provides examples of variables used for each type of segmentation, such as age, gender, and benefits sought. Finally, it discusses bases for segmenting business markets, like purchase decision stage and type