Cloud computing is a technology that uses the internet and central remote servers to maintain data and applications. Cloud computing allows consumers and businesses to use applications without installation and access their personal files at any computer with internet access. This technology allows for much more efficient computing by centralizing storage, memory, processing and bandwidth. The main empower technology for cloud computing is virtualization. Virtualization software unconnected an external computation contrivance into one or more "virtual" devices, each of which can be smoothly usage and direct to execute computing work. With operating system level virtualization really creating a scalable system of multiple easy figure devices, idle computing funds can be place and used more effectively. Virtualization contribute the agility enjoin to hurry up IT operations, and abate side by increasing infrastructure use. Autonomic enumerate automatic the process through which the use can provision means on-summon. By minimizing user involvement, automation speeds up the process, reduces industry costs and subject the contingency of man errors.