Contagious: How to Build Word of Mouth in the Digital Age” by Jonah Berger
At National Small Business Analysis, our mission is to empower small business owners and entrepreneurs with the knowledge and strategies they need to thrive in today’s competitive digital landscape. In this context, “Contagious: How to Build Word of Mouth in the Digital Age” by Jonah Berger, published in 2013, emerges as a highly recommended resource for those seeking to understand the dynamics of viral marketing and word-of-mouth promotion.
Author’s Background:
Jonah Berger, a marketing professor at the Wharton School at the University of Pennsylvania, stands as a recognized authority in viral marketing and social influence. His extensive research and expertise in these areas lend both credibility and depth to the insights presented in the book.

Core Concepts and Theories:
In “Contagious: How to Build Word of Mouth in the Digital Age,” Jonah Berger introduces the STEPPS framework, a set of six key principles that elucidate why certain ideas and products become contagious. Let’s explore these core concepts and theories:
- Social Currency: People tend to share things that enhance their social image. When individuals share information or products that make them look good or knowledgeable, it boosts their social currency. This principle highlights the importance of crafting content or products that help people appear clever or “in the know.”
- Triggers: Regular stimuli prompt people to think about related products or ideas. Berger explains that products or ideas associated with frequent, everyday triggers are more likely to stay top of mind and be shared. This concept underscores the significance of creating associations between your offerings and everyday occurrences.
- Emotion: High-arousal emotions boost sharing. Emotions like awe, excitement, anger, or humor can trigger a strong desire to share. Content or products that evoke emotional responses tend to be shared more extensively.
- Public: Making behaviors observable encourages imitation. When people can witness others engaging with a product or idea, it creates a social norm that encourages imitation. Public displays of product usage or endorsements can drive word-of-mouth sharing.
- Practical Value: Useful information is more likely to be shared. Practical value refers to content or products that provide actionable and helpful information. People are more inclined to share information that can benefit others.
- Stories: Information embedded in narratives is highly shareable. Stories are an effective way to convey information because they are engaging and memorable. Stories are not only shared but also remembered and retold.
Practical Applications:
“Contagious” provides actionable advice on how to apply the STEPPS principles in marketing campaigns. Berger uses a blend of case studies and scientific findings to illustrate how these strategies have been successfully implemented in various businesses. Practical applications include:
- Crafting Shareable Content: Entrepreneurs can create content that aligns with the STEPPS framework. This involves considering how the content can enhance social currency, trigger associations, evoke emotions, be observed publicly, offer practical value, and be presented as a compelling narrative.
- Leveraging Social Influence: Entrepreneurs can harness the power of social influence to drive word-of-mouth marketing. Encouraging individuals to share experiences or testimonials publicly can create a ripple effect.
Key Takeaways for Entrepreneurs:
Entrepreneurs can glean valuable insights from “Contagious” to enhance their marketing strategies:
- Harnessing Social Influence: Utilizing social currency and making products or ideas publicly observable can lead to viral marketing success.
- Emotional Storytelling: Incorporating high-arousal emotions into marketing campaigns enhances shareability and engagement.
- Practical Value: Offering practical and useful information in messaging can encourage word-of-mouth marketing as people share valuable insights with others.
Strengths and Limitations:
The book’s strengths lie in its insightful analysis and practical applications, making complex social psychology accessible and actionable for business purposes. However, some readers might find the need for a deeper exploration of the digital aspects of viral trends in today’s social media landscape.
Who Should Read This Book:
“Contagious” is ideal for marketing professionals, business owners, and entrepreneurs interested in understanding and utilizing the mechanisms behind word-of-mouth and viral marketing. It’s also great for anyone curious about the psychology behind why people share information.
How to Implement These Ideas:
Small businesses can implement these ideas by designing marketing strategies that provide social currency, trigger emotional responses, and offer practical value. Embedding products and ideas in compelling stories can also enhance their shareability.
Conclusion:
“Contagious: How to Build Word of Mouth in the Digital Age” is a must-read for anyone looking to unlock the secrets of viral marketing. Jonah Berger’s blend of academic research and real-world examples provides a powerful toolkit for creating content and marketing strategies that resonate and spread, aligning perfectly with our mission of helping small businesses thrive in the digital era.


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