The document discusses word of mouth marketing and its importance. It defines word of mouth as the passing of information through oral communication from person to person. Word of mouth marketing is an unpaid form of promotion where satisfied customers tell others about a business, product, or service. Word of mouth is a credible form of advertising because people put their reputation on the line with their recommendations. Examples of successful word of mouth marketing campaigns in rural areas and different industries are provided. The document also briefly describes the Word of Mouth Marketing Association, a trade organization dedicated to word of mouth and social media marketing.