Cloud computing

Cloud computing is the provision of dynamically scalable and often virtualised resources as a service over the Internet on a utility basis Users need not have knowledge of, expertise in, or control over the technology infrastructure in the “cloud” that supports them.[ Cloud computing services often provide common business applications online that are accessed from a web browser, while the software and data are stored on the servers.
The term cloud is used as a metaphor for the Internet, based on how the Internet is depicted in computer network diagrams and is an abstraction of the underlying infrastructure it conceals.