If you’re one of the estimated 6 million people on Twitter as I am, you’re familiar with the question in the headline. If you’re not quite sure about exactly what Twitter is, then take a look at the video explanation by the extremely creative video producers at Common Craft called Twitter in Plain English.

Much of Twittering takes place at work. And sometimes that can cause problems in terms of time spent or inappropriate tweets. I discuss that matter including a Twitter policy in my blog post, Twitter in the Workplace. It appears over on at my other blog home, BizBox by Slate, a special promotion by OPEN from American Express.