"Executives certainly know what social media is. After all, if Facebook users constituted a country, it would be the world's third largest, behind China and India. Executives can even claim to know what makes social media so potent: its ability to amplify word-of-mouth effects.
Yet the vast majority of executives have no idea how to harness social media’s power. Companies diligently establish Twitter feeds and branded Facebook pages, but few have a deep understanding of exactly how social media interacts with consumers to expand product and brand recognition, drive sales and profitability, and engender loyalty."
https://www.mckinseyquarterly.com/Marketing/Digital_Marketing/Demystifying_social_media_2958