A steam turbine is a device that converts the energy from steam into mechanical energy. It works by directing high-pressure steam through a series of blades attached to a rotor. As the steam passes over the blades, it causes the rotor to spin, generating power that can be used to drive generators or other machinery. Steam turbines are commonly used in power plants, where they help produce electricity. They are efficient and can operate on various fuels, including coal, natural gas, and nuclear energy. The design of steam turbines has evolved over time, making them a crucial component in modern energy production systems.