" Horchow's daughter, Sally, told me a story of how she once took her father to a new Japanese restaurant where a friend of hers was a chef. Horchow liked the food, and so when he went home he turned on his computer, pulled up the names of acquaintances who lived nearby, and faxed them notes telling them of a wonderful new restaurant he had discovered and that they should try it. This is, in a nutshell, what word of mouth is. It's not me telling you about a new restaurant with great food, and you telling a friend and that friend telling a friend. Word of mouth begins when somewhere along that chain, someone tells a person like Roger Horchow. "

― Malcolm Gladwell , The Tipping Point: How Little Things Can Make a Big Difference