Most companies are familiar with how public cloud computing works. You sign up for a third-party public cloud service, migrate whatever data you choose to the cloud via that service, and then pay for capacity based on how much you use at any given time. With a public cloud, your data is stored in an offsite data center. The most significant benefits of the public cloud are that it is highly flexible, available for quick scaling if necessary, and is cost efficient as long as you don’t
maintain a high capacity for a long period of time.
Perhaps the main reason why the public cloud is easier to understand than the private cloud is because the public cloud has more commonly understood use cases. Take Web email for example. Web email involves a vendor offering a standard cloud service to many different users via a model called SaaS (software
as a service).