The text Mass Media examines how communication channels like television, newspapers, radio, and social media shape public opinion and influence society. It explains the key roles of mass media: informing the public, shaping culture, providing entertainment, and acting as a watchdog over government and institutions. The book also discusses issues such as bias, propaganda, media ownership, and the impact of technology on how people access information. Overall, it highlights the powerful role of media in modern democracy and the importance of critical thinking when consuming information.