
Contagious
Jonah Berger
What's inside?
Explore the science behind why certain ideas and products become popular and learn how you can use these strategies to make your own content go viral.
You'll learn
Key points
01The Hidden Architecture of Word of Mouth
For decades, the traditional business world operated on a very straightforward, albeit incredibly expensive, assumption. If you wanted people to buy your product, use your service, or talk about your idea, you simply had to buy their attention. Companies poured millions of dollars into flashy television commercials, massive highway billboards, and glossy magazine spreads. The underlying belief was that whoever shouted the loudest and spent the most money would inevitably win the market. However, as the digital age dawned and consumers became increasingly skeptical of corporate messaging, a profound shift occurred. People started tuning out the advertisements. They began fast-forwarding through commercials, installing ad-blockers on their browsers, and ignoring the billboards on their morning commutes. Yet, amidst this advertising fatigue, something else was happening. Certain products and ideas were still exploding in popularity, not because of massive marketing budgets, but because everyday people simply could not stop talking about them. Consider the remarkable case of a company called Blendtec. By all traditional measures, a heavy-duty blender is not an inherently exciting product. It is a kitchen appliance designed to puree vegetables and crush ice. For years, Blendtec made fantastic, highly durable blenders, but they struggled to build tremendous brand awareness. That all changed when their new marketing director, George Wright, walked into the manufacturing facility and noticed a pile of sawdust on the floor. He discovered that the company's founder, Tom Dickson, had a habit of testing the motor strength of his blenders by shoving wooden two-by-fours into them. George was completely captivated. He realized that if he was utterly fascinated by a blender destroying a piece of wood, the general public might be as well. With a minuscule budget of just fifty dollars, George bought a white lab coat for Tom, set up a simple camera, and filmed the founder tossing a handful of glass marbles into a Blendtec blender. Tom pressed the button, and within seconds, the glass was reduced to a fine, smoky powder. They uploaded the video to YouTube under the title "Will it Blend?" and the internet absolutely exploded. Within days, millions of people had watched the video. They followed it up by blending golf balls, completely destroying a rotisserie chicken, and eventually, pulverizing a brand-new Apple iPhone. The videos became a cultural phenomenon, and more importantly, Blendtec’s sales skyrocketed by an astonishing seven hundred percent. They did not buy millions of dollars in advertising space. They simply created something so compelling that people felt an overwhelming urge to share it with their friends. This brings us to the core thesis of Jonah Berger’s research. Word of mouth is vastly superior to traditional advertising for two fundamental reasons. First, it is inherently more persuasive. When a television commercial tells you that a certain brand of toothpaste is the best on the market, your brain naturally raises its defensive shields. You know the company is paying to deliver that message, so you treat it with a healthy dose of skepticism. However, if your closest friend leans over at dinner and passionately recommends a new restaurant they tried last night, you listen intently. You trust your friend because you know they have no financial incentive to lie to you. Their recommendation carries the heavy weight of personal credibility. Second, word of mouth is incredibly targeted. Traditional advertising is akin to firing a shotgun into the dark; a company broadcasts a message to three million people during a football game, hoping that a tiny fraction of them might actually be interested in purchasing a pickup truck. Word of mouth, on the other hand, is like a highly calibrated laser beam. We do not share information randomly. If you find a great deal on a set of golf clubs, you do not tell your friend who spends all their time knitting. You tell your friend who loves golf. We naturally filter our sharing, ensuring that the message reaches the exact audience that is most likely to find it highly relevant and valuable. For a long time, the business world viewed this kind of viral sharing as a mystical, unpredictable force. Marketers believed that virality was essentially a lottery ticket. You had to have a cute cat, a hilarious joke, or a stroke of pure, unadulterated luck to get people talking. Berger completely shatters this myth. Through years of rigorous academic research, analyzing thousands of highly shared articles, videos, and products, he discovered that virality is not random at all. It is built on a very specific underlying architecture. Just as a chef uses a recipe to bake a perfect cake, anyone can use a specific set of psychological ingredients to make their ideas more contagious. These ingredients form the foundation of the STEPPS framework. STEPPS is a highly actionable acronym that stands for Social Currency, Triggers, Emotion, Public, Practical Value, and Stories. Each of these six principles taps into a fundamental aspect of human psychology and social behavior. You do not necessarily need to utilize all six principles at once to make an idea catch on, but the more of them you incorporate into your product, message, or campaign, the higher your chances of achieving explosive, organic growth. As we explore each of these principles in the following chapters, you will begin to see the world through a completely different lens. You will understand why you suddenly felt the urge to share that specific news article this morning. You will realize why certain brands lodge themselves permanently in your brain while others fade away instantly. Most importantly, you will gain the practical tools necessary to engineer your own contagious ideas, ensuring that your voice is heard, your products are purchased, and your messages are spread far and wide in an increasingly noisy world. Let us begin our journey by looking at the very first pillar of the framework, and exploring how the things we talk about serve as a powerful signal of exactly who we are.
02Designing for Social Currency and Status
We humans are deeply social creatures, and whether we like to admit it or not, we care intensely about how other people perceive us. From the moment we wake up and choose our clothing for the day, to the type of car we decide to drive, to the neighborhood we choose to live in, we are constantly broadcasting signals about our identity, our status, and our personal tastes. A luxury sports car does not just provide transportation; it tells the world that the driver is successful, bold, and wealthy. A vintage band t-shirt does not just provide warmth; it signals that the wearer has a deep, nuanced appreciation for underground music. What Jonah Berger brilliantly points out is that the things we choose to talk about serve the exact same purpose. The information we share is a form of currency. Just as we use actual money to buy physical goods, we use Social Currency to buy positive impressions in the minds of our peers. To truly understand how this works in the real world, take a stroll down St. Marks Place in New York City’s East Village. If you look closely, you will eventually stumble upon a rather unassuming, slightly gritty little eatery called Crif Dogs. It is a fantastic place to grab a deep-fried hot dog, but on the surface, there is absolutely nothing about it that would cause a global sensation. However, if you walk inside and look toward the back corner of the restaurant, you will notice a vintage, wooden telephone booth. If you step inside that cramped booth and dial a very specific, secret number on the old rotary phone, a voice will answer. If you are lucky enough to have secured a highly coveted reservation, the back wall of the phone booth will suddenly swing open, revealing a hidden, dimly lit, incredibly chic speakeasy called Please Don't Tell. Getting a reservation at Please Don't Tell is an absolute nightmare. The phone lines open at three o'clock in the afternoon, and they are usually completely booked for the entire evening within minutes. Yet, they have never spent a single dime on traditional advertising. So, how did a bar hidden behind a hot dog stand become one of the most famous drinking establishments on the planet? The answer lies entirely in Social Currency. When someone discovers a secret, hidden bar, they feel like an ultimate insider. They feel cool, connected, and in the know. What is the very first thing a person does when they feel like an insider? They tell absolutely everyone they know. They bring their friends, guide them through the hot dog stand, step into the phone booth, and watch their friends' jaws drop when the secret door swings open. By providing an experience that makes the customer look incredibly cool, the bar essentially bribes its patrons into doing all of the marketing for them. This concept of Social Currency is built on three key strategies. The first is finding inner remarkability. Something is remarkable when it is unusual, extraordinary, or completely breaks our standard expectations of how the world works. Think about the beverage company Snapple. If you twist the cap off a bottle of Snapple iced tea, you will find a strange, trivial fact printed on the underside of the lid. You might learn that a kangaroo cannot walk backward, or that an ostrich's eye is bigger than its brain. Why does Snapple do this? Because these facts are utterly remarkable. When you learn an incredibly bizarre piece of trivia, you cannot keep it to yourself. You immediately turn to the person sitting next to you and share it. By providing these remarkable little nuggets of information, Snapple gives people a way to seem highly interesting in social situations. In return, the consumers naturally bring the brand into their daily conversations. The second strategy for building Social Currency involves leveraging game mechanics. Human beings are inherently competitive. We love to measure our performance, track our progress, and most importantly, compare ourselves to others. This is why airline frequent flyer programs are so unbelievably successful. Airlines created a system of tiers—Silver, Gold, Platinum, and Elite. On the surface, these programs exist to offer free flights. But in reality, they exist to create a powerful status hierarchy. People will happily pay more money for a ticket, or take an entirely unnecessary connecting flight, just to ensure they maintain their Platinum status for the following year. Why do they do this? Because game mechanics provide a tangible measurement of social standing. When a traveler flashes their shiny Platinum card to board the plane before everyone else, they are visibly demonstrating their superiority in the travel hierarchy. They love to naturally drop their status level into conversations at dinner parties, proudly complaining about how many miles they had to fly that month. The airline gives the customer an arbitrary game to play, and in their quest to win the game and look important, the customer remains fiercely loyal to the brand and constantly talks about it. The third and final way to generate Social Currency is by making people feel like insiders through scarcity and exclusivity. Scarcity means limiting the amount of a product that is available, while exclusivity means limiting the access to that product based on specific criteria. Consider the rise of flash-sale websites like Rue La La. These platforms offer high-end designer clothing at massive discounts, but the sales only last for a very brief period, often just twenty-four hours. Furthermore, in the early days, you could not simply sign up for an account; you had to be personally invited by an existing member. This combination of extreme scarcity and strict exclusivity created a frenzy of demand. People desperately wanted access to the site because they were told they could not have it. The velvet rope effect made the platform seem infinitely more desirable. When someone finally got an invitation, they felt like they had been granted access to a highly exclusive club. And naturally, they immediately utilized their Social Currency by bragging to their friends and distributing their own limited number of invitations. We all possess a deep, psychological desire to look smart, wealthy, cool, and connected. If you can design a product, an idea, or a message that genuinely helps people achieve that desired image, they will eagerly spread your message to the farthest corners of the globe.

Continue reading with LeapAhead app
Full summary is waiting for you in the app
03Top of Mind Means Tip of Tongue
04When We Care, We Share
05Built to Show, Built to Grow
06News You Can Actually Use
07Conclusion
About Jonah Berger
Jonah Berger is a marketing professor at the Wharton School at the University of Pennsylvania. He is an expert in social influence and viral marketing, and his research has been published in top-tier academic journals. Berger is also a bestselling author, known for his book "Contagious: Why Things Catch On".