CEOs have been advised to use Twitter as a useful tool for building trust between their company and the people they wish to reach. Cited by holmesreport.com, a study from PR firm Weber Shandwick recently found that only 2% of the top 50 CEOs in Fortune Magazine’s Global 500 rankings had an active Twitter account. Despite the platform witnessing a rapid increase in account holders over the last two years, this was down from 8% in 2010.