Pumped Storage Hydroelectricity is a method of storing energy by using water. It works by pumping water from a lower reservoir to an upper reservoir during times of low electricity demand. When demand increases, the stored water is released back down, passing through turbines to generate electricity. This system helps balance supply and demand in the electricity grid. It can quickly provide power during peak usage times, making it a valuable resource for maintaining stability in energy systems. Additionally, it supports the integration of renewable energy sources like solar and wind by storing excess energy for later use.