What in the world is this? What does it mean and why\when should I use it? Also, when answering, please keep in mind I'm a female who can only distinguish other RAV4s (everything else on the road are cars, trucks, vans, or SUVS), didn't learn to gas a car until I got one, and will never, ever change a tire (unless there is a gun to my head.)Thanks in advance for your help, and really, I'm not a bad driver... or person for that matter. I'm just a princess trying to live in a world where everything is mean to me.....