Only 10% of Fortune 50 CEOs regularly Tweet. The most important reason for CEO to actively use social media is that it helps to share with all stakeholders the company values and influence culture from the top down. It will also ensure social media, where many of their customers spend part of their lives, becomes part of the culture. And a CEO that really understands and influences his company culture will help lower risks. Here are 5 more reasons CEOs should do it. Do you think that, for the same reasons, corporate director should also be involved in social media?