This chapter analyses the role of hydrogen storage in enabling a resilient and efficient hydrogen economy. It assesses a range of storage technologies, including compressed gas, liquid carriers, and underground geological formations, concluding that a diverse portfolio is essential to meet various system needs. While compressed gas is suitable for short-duration applications, underground storage in salt caverns and depleted reservoirs is the only viable option for seasonal, TWh-scale balancing. The economic viability of these technologies is primarily driven by the cost of electricity for energy-intensive processes and the capital costs of materials and civil works. Given the high capital costs and market uncertainties, the analysis of the United Kingdom’s business model demonstrates that a revenue stabilization mechanism is necessary to de-risk early-stage projects and attract investment. Ultimately, successful deployment requires a holistic, system-wide approach that strategically coordinates storage with production, transport, and end-use demand.