Next time your friend whispers some scurrilous rumor in your ear, then leans back and swears “It must be true! I saw the tweet!” be forewarned: tweets ain’t always what they seem. Not with a website ...

If you’re online—and reading this!—you’ve probably heard of Twitter. But just what is Twitter for? How does it work? And how do you get started using it? Whether you want to start using Twitter ...