This document provides an overview of key concepts in social media marketing and segmentation. It discusses how individuals engage with social media through their digital footprint and life streams. It also examines why consumers are drawn to social activities and how digital culture influences behavior. Several approaches to segmenting social media consumers are presented, including demographic, psychographic, benefit, and behavioral segmentation. Popular frameworks for categorizing different types of social media users and levels of engagement are described, such as the Social Technographics model and Pew Internet's technology types. The document aims to help marketers better understand social media consumers to effectively target and engage with different audience segments.