This document discusses word-of-mouth (WOM) marketing. It defines WOM as the informal passing of recommendations or general information between individuals. The document notes that WOM is a critical part of media interactions and that consumers are more receptive to referral-based advertising. It identifies key drivers of organic and amplified WOM, such as focusing on customer satisfaction and identifying influencers. The document also addresses ethics in WOM marketing and provides examples of both effective and unethical WOM campaigns.