A Wide Area Measurement System (WAMS) is a technology used in electrical power systems to monitor and analyze the performance of the grid over large geographical areas. It employs devices called Phasor Measurement Units (PMUs), which collect real-time data on voltage, current, and frequency. This information helps operators understand the grid's behavior and detect potential issues. WAMS enhances the reliability and stability of the power grid by providing a comprehensive view of its operation. By integrating data from multiple sources, it enables better decision-making and faster responses to disturbances, ultimately improving the overall efficiency of the electrical system.