The importance of cloud computing. Whether you use public, hybrid, virtual private or private cloud you are always benefitted with the scalability, instant provisioning, virtualized resources and ability to expand the server base quickly.
Public cloud is what most people refer to when they say "cloud computing." It refers to a computing service model used for cloud storage and computation services to the general public over the internet.
Private cloud offers virtualization and centralization without any security problems that may otherwise arise from a public cloud.
Hybrid cloud offers a mix of public and private cloud services. Hybrid cloud is particularly valuable for dynamic or highly changeable workloads.