With expanding volumes of knowledgeable production and the variability of themes and roots, shapes and languages, most detectable issues related to the delivery of storage space for the information and the variety of treatment strategies in addition to the problems related to the flow of information and methods go down and take an interest in the advantage of them face the researchers. In any case, such a great significance comes with a support of a great infrastructure that includes large data centers comprising thousands of server units and other supporting equipment. The cloud is not a small, undeveloped branch of it, it is a type of computing that is based on the internet, an image from the internet. Cloud Computing is a developed technology, cloud computing, possibly offers an overall economic benefit, in that end users shares a large, centrally achieved pool of storing and computing resources, rather than owning and managing their own systems. But, it needs to be environment friendly also. This review paper gives a general overview of cloud computing, also it describes cloud computing, architecture of cloud computing, characteristics of cloud computing, and different services and deployment model of cloud computing. This paper is for anyone who will have recently detected regarding cloud computing and desires to grasp a lot of regarding cloud computing.