A depth map is like a special picture that helps computer programs and robots better understand real-world environments. Instead of a regular photograph, where everything looks flat, a depth map has layers of information that tell how far away different objects in the picture are from each other. For example, if you saw a picture of a beach with sand and ocean, the depth map might tell a computer that the sand is the closest thing to the camera, the ocean is the farthest away, and the trees and people would be somewhere in the middle. This helps the computer create a three-dimensional view of the scene, so it can understand it better.