This document defines market segmentation and discusses its purpose and types. Market segmentation involves dividing a market into subgroups of individuals or organizations that have similar needs, characteristics, or behaviors. The key purposes of segmentation are to increase marketing efficiency, maximize resources, select the most profitable segments, and find markets with limited competition. There are several ways to segment a market, including by geographic, demographic, psychographic, and behavioral factors. The document also outlines the segmentation process and levels of segmentation from mass to niche marketing.