Imagine that you have a special toy that no one else has. You want to make sure that people can easily find your toy if they need to. So, you give your toy a special number that only belongs to it - this is like a unique property reference number.
Just like your special toy, each house or property usually gets its own special number that is not the same as any other property. This number is called a unique property reference number. It helps people like real estate agents and government officials to easily find and identify a specific property when they need to.
With this special number, it becomes easier to keep track of who owns the property, if there are any taxes owed on it, or if there are any other legal issues that need attention. It's like a secret code that only belongs to that property and it helps keep things organized and orderly.