A precision approach is like drawing a straight line with a ruler. It helps pilots fly a plane very smoothly and land the plane exactly where they want to, like drawing a line accurately on a piece of paper. It's like having a special helper who tells the pilots exactly which way the plane should go and how high it should be, so they don't have to guess. This means they can safely land the plane, even if it's very foggy or in bad weather. Imagine playing a video game and having a map that tells you where to go and how to get there - that's kind of like what a precision approach does for pilots. It helps them safely land the plane even in tricky situations.