Rheology is the study of how materials deform and flow under applied forces. It examines the behavior of both liquids and solids, focusing on their viscosity, elasticity, and plasticity. This field is essential in understanding how substances like paints, polymers, and food products behave during processing and application. Researchers in rheology use various instruments to measure the flow properties of materials, helping industries optimize their products. By analyzing how materials respond to stress and strain, rheology plays a crucial role in fields such as materials science, engineering, and biomedical applications.