<p>This review summarizes recent progress in the study of impinging-jet dynamics and atomization, with a focus on liquid sheet formation, instability mechanisms, and the influence of key parameters such as fluid properties, Weber number, and Reynolds number. Special attention is given to atomization behaviors under high pressure and external perturbations. Representative experimental and numerical approaches are introduced, and critical findings under complex conditions are highlighted. In addition, practical applications of impinging-jet technology in aerospace propulsion, biomedical devices, and energy science are discussed. This review aims to serve as a concise reference for researchers interested in multiphase flow dynamics and engineering applications of impinging jets.</p>