Abstract <p>The drop impact, a fundamental topic in fluid mechanics, plays a pivotal role in diverse engineering applications such as atomization, evaporation, spray coating, and surface cooling. This study systematically examines the key factors governing droplet impact phenomena, employing dimensionless analysis to establish universal scaling relationships for characterizing the process. Classical theoretical frameworks are reviewed to outline the governing mechanisms of post-impact behaviors, including spreading, splashing, and receding, while highlighting their distinct morphological evolution under varying conditions. Furthermore, recent experimental advancements are critically evaluated to address emerging challenges, such as the influence of surface topography, fluid rheology, and environmental parameters on impact outcomes. By integrating foundational theories with contemporary research, this review provides a structured synthesis of the field, aiming to bridge theoretical insights with practical engineering needs. The work serves as a reference guide to foster innovation in applications reliant on precise control of droplet-surface interactions.</p>