Okay kiddo, have you ever used a map to help you get somewhere? A short map is just like a regular map, but it's smaller and shows a shorter distance.
Think of it like drawing a picture of your house and your friend's house. You wouldn't need to draw a big picture of the whole town, just a small one of your street or neighborhood. That's like a short map - it only shows a small area.
Short maps can be helpful if you need to quickly find your way around a small town or neighborhood. They might not show all the details of a big map, but they're easier to carry around and use.