Decarbonising energy-intensive industries are essential for Europe's climate change mitigation goals. European countries have prioritised using hydrogen as a crucial element for the energy transition. The iron and steel sector must begin its transformation towards lower emission production. The interest in zero-emission steel has increased among private sectors and the government, and the scaling-up of hydrogen-based steelmaking is the solution that will become cost-competitive in those regions with cheap renewable electricity and will trigger an innovation boost that will reduce the costs of elements within the green hydrogen value chain. The following work consists of a theoretical framework of hydrogen, starting from its production, storage and distribution toward the end-use applications.