Magnetorheological fluids are smart materials that change their viscosity in response to a magnetic field. When exposed to a magnetic field, the particles within the fluid align and form structures, making the fluid behave like a solid. This property allows for quick adjustments in stiffness and flow, making them useful in various applications. These fluids are commonly used in automotive systems, such as shock absorbers, to improve ride comfort and handling. They also find applications in robotics, medical devices, and industrial machinery, where precise control of movement and force is essential.