This document discusses market segmentation and selecting target markets. It defines market segmentation as dividing the total market into smaller, homogeneous groups. Different types of segmentation criteria are described, including geographic, demographic, and psychographic factors. The document outlines a five-stage process for market segmentation that involves identifying segments, developing profiles, forecasting potential and market share, and selecting specific segments. Effective segmentation criteria are defined as measurable, promotable, and profitable.