Economies of scale refer to the phenomenon where a company's average cost per unit of output decreases as its production scale increases. This occurs primarily because fixed costs—such as those for factories, equipment, and research and development—can be spread over a larger number of units, thereby reducing the cost per unit. Additionally, large-scale production can lead to benefits such as stronger bargaining power in procurement, deeper specialization of labor, improved production efficiency, and the accumulation of technical and managerial expertise. In short, the more units a company produces, the higher its production efficiency and the lower its unit costs, resulting in stronger market competitiveness. This advantage is widely observed across many industries and serves as a key driver for corporate growth and profitability.