Electrolysis is a process where an electric current is passed through an electrolyte, leading to the decomposition of the electrolyte into its constituent elements. This process is widely used in industries such as metal refining, where it is employed to extract pure metals from their ores. For instance, in the aluminum industry, electrolysis is crucial for obtaining aluminum metal from alumina. The expected answer should elaborate on the principles of electrolysis, including the role of electrodes, the movement of ions, and the formation of products. It should also highlight the significance of electrolysis in various industrial processes, providing specific examples.