What is a sumilation?

Answer 1

Probably the writer meant simulation, but this is a mis-spelling, normally of Asian origin, also probably linked to verbal pronunciation as influenced by the writer’s first language.

Answer 2

A simulation is a computer model or program that imitates or replicates the behavior of a real-world system. It is used to study and understand the system's behavior, make predictions, and test different scenarios without having to physically interact with the real system. Simulations are widely used in various fields, such as science, engineering, economics, and training.