A galvanic cell is a device that converts chemical energy into electrical energy through spontaneous redox reactions. It consists of two half-cells, each containing an electrode and an electrolyte. The electrodes are typically made of metals, such as zinc and copper, and the electrolytes are solutions that allow ions to move between the half-cells. In a galvanic cell, oxidation occurs at the anode, where electrons are released, while reduction takes place at the cathode, where electrons are gained. The flow of electrons from the anode to the cathode generates an electric current, which can be harnessed to power electrical devices.