ELI5: Explain Like I'm 5

Simulation software

Simulation software is like a computer game. It lets you create a world where you can make things happen, just like in a real world. It can be used for things like testing how a car might move, or predicting how a new bridge might stand up to a storm. You can also use simulation software to practice things like flying an airplane, or driving a boat. The computer models all the details, so you can see what will happen in a real-life situation, without having to do it in reality.