Social media marketing has become an important part of any brand’s digital marketing mix, helping brands of all sizes foster customer connections and engagement. But as more consumers use social media to “ring the bell” and gain access to the person who can help solve their problems, many find the social bell is out of order when it comes to customer service. For social media wiz Dan Gingiss , McDonald’s Corporation’s Senior Director of Global Social Media, customer service is arguably one of the most important pieces of social media marketing.