Market segmentation involves dividing a large market into smaller sub-groups of customers with distinct needs, preferences, or behaviors. It allows companies to target specific customer segments more effectively. There are several ways to segment markets, including geographically, demographically, psychographically, and based on customer behavior. Key types of segmentation include dividing markets by location, age, income, gender, lifestyle, and purchasing patterns. Understanding customer segments helps companies focus their strategies and allocate resources more efficiently.