This document discusses market segmentation, targeting, and positioning. It provides criteria for effective segmentation, including that segments must be measurable, substantial, accessible, differentiable, and actionable. It also describes various market targeting strategies such as undifferentiated marketing, differentiated marketing, concentrated marketing, and micromarketing. Undifferentiated marketing uses one standard offer for the whole market while differentiated marketing designs separate offers for different segments. Concentrated marketing targets a niche market and micromarketing customizes products and marketing for individuals.