Twitter is a free social networking and micro-blogging service, that allows its users to send and read other users' updates (otherwise known as tweets),...
Twitter - Wikipedia, the free encyclopedia
I'm currently have over 200 followers on Twitter. Everytime I twitter a link or page I'm surfing, Twitter automatically posts that page or link to all my followers allowing them to visit the link or read the post if the choose to.
Twitter is like a blog (it's a microblog actually) but you're typically limited to 140 to 240 characters, depending on how you send your Tweet. In that respect, it's almost like cell phone texting but you can "text" to multiple people or "followers" at the same time.
It's a lot of fun and one way to brand yourself on the Web. Many businesses twitter as well and you can receive their twitters by following them.
Check out this video:
www.twitter.com