When it comes to social media, today’s CEOs have made a remarkable transition over the past five years. A recent analysis by my firm, Weber Shandwick, found that 80% of the chief executive officers of the world’s largest 50 companies are engaged online and on social media. The results, published in “Socializing Your CEO: From Marginal to Mainstream,” show that CEO sociability has more than doubled since we began tracking the social activities of chief executives in 2010, when only 36% of CEOs were social.