Green hydrogen, derived from renewable sources, is highlighted as a key solution in combating climate change and enhancing energy security. Unlike grey or blue hydrogen, green hydrogen is entirely carbon-free, making it a crucial tool in decarbonizing sectors that are challenging to electrify. The process of green hydrogen production involves electrolysis, utilizing renewable energy to split water into hydrogen and oxygen gases. This green hydrogen can then be stored and transported for various applications. The advantages of green hydrogen include its carbon-free nature, versatility in applications, energy storage capabilities, and its potential to aid in the decarbonization of hard-to-abate sectors like aviation and heavy manufacturing. However, challenges such as high production costs, infrastructure gaps, energy efficiency concerns, and water demand issues must be overcome for green hydrogen to reach its full potential. Globally, countries and companies are investing in green hydrogen initiatives to drive its adoption. Notable efforts include the EU's electrolyzer installation targets, India's hydrogen production goals, and Australia's hydrogen hub projects. As production costs decrease and support frameworks strengthen, green hydrogen is expected to play a significant role in the shift towards clean energy. The collaboration between governments, industries, and innovators is crucial to unleash the full benefits of green hydrogen, paving the way for a sustainable, resilient energy system.