The document discusses top social media campaigns for three leading e-commerce companies in the United States. It shows that Amazon has the largest fanbase on Facebook and Twitter with over 33 million followers. Amazon's #AmazonPrime campaign generated the most buzz in the last 30 days with over 8,000 posts. Walmart has the second largest social media following, while eBay's #eBayFashion campaign was the least discussed but still utilizes daily promotions to engage its brand's followers. The document also provides an overview of social media analytics company Simplify360 and its service offerings for social marketing, customer service, and analytics.