Contagious

In 'Contagious: Why Things Catch On,' Jonah Berger explains that the popularity of products, ideas, and behaviors is driven by six key principles: social currency, triggers, emotion, public visibility, practical value, and stories.

Berger argues that word of mouth, rather than traditional advertising, is the primary force behind making things popular.

He provides case studies, real-world examples, and research findings to support these principles, which can be applied to various fields including marketing, social causes, and political campaigns.

The book emphasizes that contagious content can spread through everyday conversations rather than relying on socially influential individuals.