The document discusses market segmentation and summarizes key points from the literature. It begins by defining market segmentation as dividing a large market into smaller subgroups based on common needs and behaviors. It then reviews several common bases for segmentation, including geographic, demographic, psychographic, and behavioral factors. Some examples discussed include segmenting by age, gender, income level, lifestyle, and occasions. The document also outlines criteria for effective market segments and reviews literature on the importance and competitive necessity of segmentation. It concludes by describing the sources of data gathered - official Indian census data and projected population data from a marketing textbook.