OK, so you know how when you want to make something, like a toy car or a house out of Legos, you need to use instructions to know which pieces to use and how to put them together? The same thing is true for computers and computer programs.
But, there are lots of different kinds of computer programs, and they all use different instructions. So, if you wanted to play a game on your computer, the game company would need to give you instructions that are specially made for your computer's type. This can be really hard and take a lot of time, especially if lots of different computers are going to play the game.
This is where the Universal Hex Format comes in! It's like a set of instructions that can work on lots of different types of computers, kind of like how Lego instructions can work for different types of Lego sets. This makes it much easier for game makers or other computer programmers to create programs that work on lots of different computers. It saves time and money, and makes it easier for people to use different types of computers to do things like play games or run programs.