The article discusses the increasing global shift towards renewable energy sources like solar PVs, hydro, geothermal, and wind to combat global warming and fossil fuel-related air pollution. It highlights the growth in renewable capacity additions worldwide and the significant contributions from various countries such as the USA, EU, China, and India. Despite this growth, the intermittent nature of renewables poses challenges that require robust storage solutions. The article emphasizes the potential of green hydrogen as a solution, produced through water electrolysis using renewable electricity. Hydrogen's versatility across sectors and as a chemical feedstock is recognized, with its production methods discussed. The paper provides a comprehensive review of the green hydrogen value chain, covering production, transportation, storage, and applications, and identifies research gaps. Strategies for integrating green hydrogen into grid systems are detailed, with a focus on enhancing resilience and efficiency in the short and long terms. Global case studies from green hydrogen projects worldwide are used to inform acceleration strategies for the widespread adoption and deployment of green hydrogen technologies across sectors and geographies.