Okay kiddo, so think of a URL like the address of a house. Just like how an address tells you where a house is located, a URL tells your computer where to find a webpage on the internet. Now, URL mapping is like having a map that shows you how to get to different houses or webpages.
Let's say you have a big website with lots of pages, and you want to make sure people can find everything easily. You can create a map that shows which URL goes to which page. This is called URL mapping.
So, when someone types in a URL, the website uses the map to figure out which page to show them. It's kind of like a treasure hunt, where the URL is the clue and the website is the treasure. The map just helps you find the treasure faster!
In summary, URL mapping is like having a map that shows you where different web pages are located on a website, so you can easily find what you're looking for.