Recent developments in Internet technologies cause people to integrate new technologies in their daily life. Around 40% of the world population has an Internet connection today. The number of Internet users has increased more than tenfold from 2000 to 2014. Especially young generation communicate and form their relationships through social media. This yearbook, Perspectives on Social Media, presents the most recent trends in a variety of sectors like education, information services, economy, entertainment, urban planning, management, design, gaming, transportation, etc. While reading the book, it is obvious to see that no sector will remain with no social media. This book is divided into seven sections to present trends and future predictions on social media in a variety of countries.