The article discusses how hydrogen production from water electrolysis can be a great way to store electricity for the future energy supply. The researchers reviewed different types of electrolysis methods like alkaline, solid polymer, and high temperature electrolysis. They found that water electrolysis technology can be a practical solution for storing electricity generated from alternative energy sources like solar and wind power, which are intermittent. This method could help control the supply and demand of electricity in the future as fossil fuels are being depleted.