Reciprocity Principle

Social Proof

Social proof is the psychological phenomenon where people copy the actions of others in ambiguous situations, assuming those actions reflect correct behavior. First articulated by Robert Cialdini in his 1984 book *Influence*, it is one of the most powerful forces driving purchasing decisions online.

Liking Principle

The liking principle is Cialdini's finding that people are significantly more likely to be persuaded by, purchase from, and say yes to individuals and brands they like, identify with, or feel positively toward. Liking is built through similarity, familiarity, physical attractiveness, association with positive experiences, and genuine compliments.

Word-of-Mouth Marketing

Word-of-mouth marketing (WOMM) is marketing driven by satisfied customers voluntarily recommending a product or service to others — through personal conversations, online reviews, social posts, or direct referrals — without paid promotion. It is widely regarded as the most trusted and cost-effective form of marketing because the endorser has no financial incentive and speaks from genuine personal experience.

Referral Marketing

Referral marketing is a growth strategy that encourages existing customers to recommend a product or service to people in their network, typically in exchange for an incentive or reward such as a discount, credit, or cash bonus. Unlike organic [[word-of-mouth-marketing|word-of-mouth]], referral marketing formalises and amplifies recommendations through a structured programme with defined incentives and tracking.

Customer Satisfaction

Customer satisfaction is a measure of how well a product, service, or experience meets or exceeds customer expectations. It is typically tracked through surveys, ratings, and feedback mechanisms, and serves as a leading indicator of customer loyalty, retention, and revenue growth.