Cloud infrastructure refers to the underlying hardware and software components such as servers, storage, networking, and virtualization software that are needed to support cloud computing services. It provides the foundation for delivering cloud-based applications and services to users over the internet. Cloud infrastructure enables organizations to scale resources on-demand, reduce capital expenses, and improve flexibility and agility in deploying and managing IT resources. By leveraging cloud infrastructure, businesses can focus on innovation and growth without worrying about the complexities of managing physical hardware and infrastructure.