1 Introduction
I. MESSAGES
2 The Communication Model
3 Message Types
4 Measuring Social Media
II. PEOPLE
5 User Interaction and Co-Creation
6 Uses and Benefits of Social Media
7 Digital Inequality, Age, and Social Class
8 Race and Gender
III. NETWORKS
9 Social Networks
10 Virtual Communities
11 Social Media Marketing
IV. CULTURE AND SOCIETY
12 Cultural Representations and Practices
13 Political Life
14 Economic and Legal Structures