Simulation is a research area that involves creating computer models or algorithms to predict the behavior and outcomes of complex systems or processes. This can include simulations of physical systems, social interactions, economic markets, or biological processes. By running simulations, researchers can test different scenarios, understand the underlying mechanisms of a system, and make informed decisions based on the results. Simulation is widely used in various fields such as engineering, economics, healthcare, and environmental science to study and improve real-world systems.