Electrolytic cells are electrochemical devices that use an external electric current to drive non-spontaneous chemical reactions. They consist of two electrodes immersed in an electrolyte solution. The applied voltage forces electrons to flow from the anode (positive electrode) to the cathode (negative electrode). This electron flow causes oxidation at the anode and reduction at the cathode. Electrolytic cells are used in various applications, including electroplating, production of chlorine gas, and electrolysis of water to generate hydrogen and oxygen.