Cloud infrastructure supports large-scale applications by providing scalable, on-demand resources such as computing power, storage, and networking capabilities. This infrastructure allows businesses to easily adapt to changing workloads without the need to invest in physical hardware. By leveraging virtualization and distributed computing, cloud services can efficiently manage resource utilization, ensuring performance and availability. This flexibility empowers organizations to deploy, scale, and manage applications across multiple environments, enhancing their operational agility and responsiveness to market demands.