ELI5: Explain Like I'm 5

Total order

A total order is like putting things in order from the most important to the least important. Every item in the order is given a special number that shows where it is in the order. Let's say we have some toys to put in a total order.

First, we have a LEGO set, which is very important to us. We give it the number 1 because it's the most important thing.

Next, we have a bouncy ball that we like to play with. It's important, but not as important as the LEGO set. We give it the number 2 because it comes after the LEGO set.

Thirdly, we have a small eraser that we don't really use much. We give it the number 3 because it's not as important as the LEGO set and the bouncy ball.

Finally, we have a used pencil that we don't really care about. We give it the number 4 because it's the least important thing on our list.

So, our total order is LEGO set (1), bouncy ball (2), eraser (3), and used pencil (4). This way, we know that the LEGO set is the most important thing on our list and the used pencil is the least important thing.