I was skeptical at first too. 

Twitter is a kind of combination blog and social network site. What's different about it and what makes it fun and easy is you can answer the question "What Are You Doing?" or you can write in anything at all as long as you can do it in 140 characters! 

Watch the video below that explains the whole thing in plain old easy non-computer English. Then if you decide to join (it's free!), search for my Twitter page at ruth107 and click on Follow! Watch the video then go to Twitter.com and you'll be Tweeting before you know it!