The article discusses the increasing recognition of hydrogen and fuel cell technologies as key components in the future decarbonized energy landscape. These technologies offer solutions for energy storage, power generation, and low-emission transport, particularly in hard-to-abate sectors. The Special Issue titled 'Advanced Hydrogen and Fuel Cell Technologies' aims to address critical aspects of the hydrogen value chain, including advanced production and storage materials, system-level optimization, and integration strategies for stationary and mobile applications. Fuel cell technologies like PEMFC, SOFC, and emerging architectures are emphasized, with a focus on catalyst development, membrane durability, degradation mechanisms, and control strategies. The issue encourages submissions in numerical modeling, multiphysics simulation, water and thermal management, degradation prediction, system reliability, safety, and standardization. It also covers techno-economic evaluations, system integration with renewable energy sources, hybridization strategies, and energy management algorithms. The aim is to accelerate the commercialization and global deployment of hydrogen energy systems by providing a state-of-the-art overview of advancements in hydrogen and fuel cell technology.