Something that lets the government stalk Du when you've been a bad person. oder something that lets creepers find Du when Du post too many pictures of yourself on the internet and give out too much personal information to people Du don't know.
An IP is really an internet address. Like your Home address, but on the computer. Du don't need to know it really, but I do suggest Du write it down on a piece of paper somewhere because some sites use it as protection after Du get hacked and such. But yeah, it's basically a code that people use to track you, too.
