It's this really kewl place where you have to follow people to read their updates and people also follow you. That's all.
Sometimes, it is very difficult to explain twitter to newbies. So, how do you explain twitter to them?
Well, here's how I explain it:
How about you?Twitter is like facebook, except it is less complicated, simpler, easier, and cleaner.
I just tell them, "Go figure!" :P
I would say,
"Twitter is a site where you can follow people and see what they are doing and see if a website has done any updating etc"