Social networks have had a profound impact on how businesses operate, communicate, and serve their customers. The most visible business firm use of social networks is as a marketing and branding tool. The most popular social network tool for large corporate businesses is Linkedln, with 97% of the Fortune 500 having a Linkedln company page. TWitter is the second most popular, with 83% having corporate TWitter accounts, including 7 of the top 10 companies. About 80% have a Facebook page. Pinterest has the fastest growth rate among the Fortune 500, increasing from 9% in 2013 to 36% in 2014 (Nanji, 2014). A less visible marketing use of networks is as a powerful listening tool that has strengthened the role of customers and customer feedback systems inside a business. The software drink industry is a good example. Coca-Cola has built a fan base of 88 million on Facebook. Pepsi has 33 million Likes, Dr. Pepper 16 million, and Mountain Dew about 8.8 million.