[Ohhh, one of those wizardy types who didn't know anything about muggles. It was really a public service to assist them. She felt all benevolent, like Mother Teresa with lipgloss on.]

It's...sort of like the journals but for muggles. And you can find almost any other muggle on it. Except for swots and ancient people like parents.

But of course, you need a computer for it, which, quelle surprise, doesn't work at Hogwarts.