<p>This comprehensive review paper endeavors to elucidate the recent advancements and innovations in the integration of nanometer energetic additives into composite solid propellants. The focus is on the utilization of nanometal energetic additives, including various metallic derivatives, which serve as catalytic burn rate modifiers and facilitate steady flow combustion processes. The proportion of additives and their peak high temperatures determine the feasibility of additive amounts and significantly impact the size scaling due to their high surface-to-volume ratios and reactive affinity. The paper scrutinizes various propellant samples fortified with nano-energetic additives and examines their effects on performance parameters such as burning rate or regression rate, reactivity, and the steady conduction of combustion over time. The nanometer size of additives enables even dispersion of the propellant, which directly influences diffusion distance, high flame temperature, and consequently, the thrust production capacity. In this discourse, different nanoscale additives and combinations with a variety of structure, shape, size, and thermochemical properties, which potentially enhance the regression rate and promote better thermal decomposition by lowering thermal decomposition temperature and activation energy. The paper primarily considers various combinations, including primarily transition metal and aluminum additives, along with multi-metallic compounds, and investigates reaction behaviors. These combinations possess variable properties and have demonstrated positive results over baseline materials. This research directly supports the affordable and clean energy a Sustainable Development by exploring ways to improve the performance and efficiency of hybrid and solid rocket propellants through nanoscale additives.</p>