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