Hi Meg888. Google twitter and it'll take you to the website which gives you a pretty good explanation. It's a bit like blogging but you are only allowed a limited number of characters (140 I think). Your messages are then sent to your 'fans' (presuming you have any). Pretty useful I suppose if you want to know what Stephen Fry had for breakfast. I would assume you would need a fairly large ego to use it if you aren't a 'celeb'. Although I can see its use in business where you may need to message a lot of people at the same time. Although I can't see what advantage it has over email especially with the character limitations.