Cloud refers to a network of remote servers accessed over the internet to store, manage, and process data, rather than relying on local servers or personal computers. This model offers scalable resources and services, enabling users to access applications and data from anywhere with an internet connection. Cloud computing encompasses various service models, including Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS), each providing different levels of control and management. By leveraging cloud services, organizations can reduce IT costs, enhance flexibility, and improve collaboration.