Social norms are the unwritten rules that guide behavior within groups. People look to others to determine correct actions, making perceived normal behavior a powerful influence on purchasing decisions. Marketers leverage this tendency through and normative messaging.
Types of Social Norms
Descriptive norms reflect what people actually do. "Most customers choose this option" describes observed behavior. These norms work because people assume popular choices are good choices.
Injunctive norms reflect what people approve of or think should be done. "Recommended by experts" appeals to approval rather than popularity. These norms involve social judgment about correct behavior.
Research shows descriptive norms generally outperform injunctive norms in marketing. Telling people what others do proves more effective than telling them what they should do.
How Social Norms Affect Purchasing
People purchase to imitate those around them or to feel accepted within their community. Seeing others buy a product signals its quality and social acceptability. This reduces decision risk by following established patterns.
Hotel towel reuse signs demonstrate this effect. Signs stating that other guests reuse towels increase reuse rates more than environmental appeals alone. Social proof outperforms logical arguments.
Ecommerce Applications
Reviews and ratings: Display purchase counts, review numbers, and rating distributions. "10,000+ customers" establishes a descriptive norm.
Bestseller badges: Highlighting signals what others choose.
Real-time activity: "15 people viewing this" or "Bought 3 times today" creates immediate social proof.
Testimonials: Customer stories show what people like the buyer have done and approved of.
Effective Implementation
Focus on what most people actually do rather than what they should do. Avoid explicit rewards or punishments. Highlight benefits to others or to customer freedom rather than compliance pressure.
