This document discusses market segmentation and target selection. It identifies four levels of market segmentation: segment marketing, niche marketing, local marketing, and individual marketing. Segmentation can be done geographically based on regions, demographically based on variables like age, or psychographically based on lifestyle. When evaluating segments, companies can use selective specialization, targeting a few profitable segments, or full market coverage, attempting to serve all customer groups. The key is for companies to identify different market segments and decide which ones to target effectively.