Public Cloud
The Public Cloud is a cloud infrastructure that is used simultaneously by multiple users. Such infrastructure is managed and owned by a cloud provider. The most common way of its execution is IaaS (Infrastructure as a Service), the providing of hardware facilities as a cloud service: servers, networking equipment, storage, etc.
Unlike a private cloud, a public cloud implies you can get a ready-made infrastructure without major capital expenses. The user pays only monthly fees for leasing resources.