A Tuned Mass Damper (TMD) is a device used to reduce vibrations in structures, such as buildings and bridges. It consists of a large mass mounted on springs and dampers, which is tuned to the frequency of the vibrations it aims to counteract. When the structure sways, the TMD moves in the opposite direction, helping to stabilize the building and minimize movement. TMDs are commonly found in tall buildings, especially in areas prone to strong winds or earthquakes. By absorbing and dissipating energy, they enhance the safety and comfort of occupants. This technology is crucial for maintaining the integrity of modern engineering designs.