Many Business Executives are interested in understanding more about how they can use Social Networking (like Twitter) to grow their businesses. However, most people still don't know "What" Twitter is? Below is a wonderful video from Common Craft that seems like it was created for 3rd graders (please don't this personal).... perfect for most people trying understand new technology. Hope this helps with your understanding.
[youtube=http://www.youtube.com/watch?v=jGbLWQYJ6iM]