Microsoft Azure' হলো একধরণের -

Public clouds are owned and operated by third-party cloud service providers, which deliver their computing resources, like servers and storage, over the Internet.
Microsoft Azure is an example of a public cloud.
With a public cloud, all hardware, software, and other supporting infrastructure is owned and managed by the cloud provider.
You access these services and manage your account using a web browser. 

Source: azure.microsoft.com