Public Cloud: is a form of cloud computing model in which a company relies on a third-party cloud service provider for services such as servers resources, data storage applications, updated and security which are delivered to the company through or within the Internet. A public cloud can free companies from the potentially expensive costs of having to purchase, manage and maintain on-premises hardware and software infrastructure. 

Public clouds can also typically be deployed much faster and with more scalability and accessibility than on-premises infrastructure as a result of the public cloud provider’s expertise and existing infrastructure. Public cloud subscribers may pay pay-as-you-go fees or fixed monthly fees for the public cloud services they utilize.