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 flow of electrons occurs from the anode to the cathode, generating an electric current. In a galvanic cell, the anode is where oxidation occurs, releasing electrons, while the cathode is where reduction takes place, accepting electrons. The movement of ions in the electrolytes helps maintain charge balance, allowing the cell to produce electricity until the reactants are depleted.