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The document summarizes five companies that effectively use social media for marketing: Walt Disney Co. engaged users on Twitter with a hashtag campaign that generated over 300 tweets in three weeks; The Coffee Groundz began hosting "tweet-ups" after their first to-go order was placed on Twitter, generating publicity; General Mills reached 25,000 Facebook fans through unexpected customer interaction; Intel held an animation competition on Facebook that engaged 56,000 fans from 101 countries; and Forty used staff photos on social media rather than logo ads, gaining over a million impressions costing less than $400.Read less