Cloud computing, What is it?
 

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Cloud computing, often referred to as simply “the cloud,” is the delivery of on-demand computing resources — everything from applications to data centers — over the internet on a pay-for-use basis.

Elastic resources — Scale up or down quickly and easily to meet demand
Metered service so you only pay for what you use
Self service — All the IT resources you need with self-service access

Hi, I like that manoharparakh here tried to explain the cloud computing here but I think nowadays there are lots of resource and articles available to know about the cloud computing. which can definitely help you in understanding much better.

Goodluck!

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Cloud computing is an information technology (IT) paradigm that enables ubiquitous access to shared pools of configurable system resources and higher-level services that can be rapidly provisioned with minimal management effort, often over the Internet. Cloud computing relies on sharing of resources to achieve coherence and economies of scale, similar to a public utility.

Third-party clouds enable organizations to focus on their core businesses instead of expending resources on computer infrastructure and maintenance. Advocates note that cloud computing allows companies to avoid or minimize up-front IT infrastructure costs. Proponents also claim that cloud computing allows enterprises to get their applications up and running faster, with improved manageability and less maintenance, and that it enables IT teams to more rapidly adjust resources to meet fluctuating and unpredictable demand. Cloud providers typically use a "pay-as-you-go" model, which can lead to unexpected operating expenses if administrators are not familiarized with cloud-pricing models

Simply stated, cloud computing is the distribution of computing services over the Internet (“the cloud”) in order to provide quicker innovation, more versatile resources, and economies of scale.