The proliferation of various cloud computing services has resulted in the widespread adoption of several new concepts and vocabularies in the world of IT infrastructure. IaaS, PaaS, and SaaS are frequently given examples of these cloud services. Yet, there isn't always enough information on hand to make the distinctions among these categories of cloud deployment models very clear. This article aims to clarify these concepts, go deeper into their background, present examples, explain use cases, and emphasize their main differences.

The term Cloud isn’t a physical entity but is meant to represent the infrastructure of the internet. It’s called Cloud to signify that the users of the Cloud don’t have to worry about the underlying complexities of the infrastructure but can use it as building blocks for their application. Behind the scenes, the cloud is a vast network of physical machines across the globe connected together and abstracted for its end users for dedicated tasks from running applications to storing data to managed applications.