Electrolytic refining is a process used to purify metals, such as copper or gold. It involves dissolving impure metal in an electrolyte solution and using an electric current to separate the pure metal from impurities. The impure metal acts as the anode, while a pure metal plate serves as the cathode. As the electric current flows, pure metal ions move from the anode to the cathode, depositing as a refined layer. This method is efficient and produces high-purity metals, making it essential in industries that require high-quality materials for manufacturing and electronics.