In " Contagious: Why Things Catch On ," Jonah Berger explains that virality is driven by a six-part framework known as STEPPS: Social Currency, Triggers, Emotion, Public, Practical Value, and Stories. The book outlines how these principles, such as high-arousal emotions and observable public actions, drive social transmission.
You can find more information about this book on the Simon & Schuster website or by reading Wharton's summary . Contagious Why Things Catch On