Market targeting involves evaluating market segments and selecting one or more to target based on their attractiveness and the company's ability to serve them. Target markets can be segmented based on geography, demographics, psychographics, behavior, or product relationship. Effective target segments are measurable, substantial, accessible, differentiable, and actionable. Companies must analyze segment needs, attractiveness, profitability, positioning, and strategy fit when selecting targets. There are five patterns of target market selection: single-segment concentration, selective specialization, product specialization, market specialization, and full market coverage.