Because each part of it can expand and contract, like in an accordion. If you don't know what an accordion is, just imagine a cute fluffy cat. You still won't know what it is, but at least you'll feel better about not knowing.
Huh.
No, not unless you're designing a MySpace profile. The {" element is cool though, and you can use that for a lot of things. I'm using
it on this page right below here, to show the code for each example!