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“Simply put, cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet (“the cloud”) to offer faster innovation, flexible resources, and economies of scale. You typically pay only for cloud services you use, helping you lower your operating costs, run your infrastructure more efficiently, and scale as your business needs change.”

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Third-party cloud service providers own and run public clouds, which distribute computing services such as servers and storage over the Internet. The cloud provider owns and maintains all hardware, applications, and other supporting resources in a public cloud. You use a web browser to access these services and maintain your account.

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A private cloud is a collection of cloud computing services used only by a single company or organization. A private cloud can be physically housed on-site at a company's datacenter. Some businesses often pay for their private clouds to be hosted by third-party service providers. The services and infrastructure of a private cloud are managed on a private network.

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Public and private clouds are mixed in hybrid clouds, which are connected through technology that enables data and applications to be exchanged between them. A hybrid cloud gives your company more flexibility, more implementation choices, and helps leverage your current infrastructure, protection, and enforcement by enabling data and applications to migrate between private and public clouds.

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Infrastructure as a service (IaaS) Platform as a service (PaaS) Serverless computing Software as a service (SaaS)

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Cloud computing services in their most basic form. You rent IT infrastructure—servers and virtual machines (VMs), storage, networks, and operating systems—on a pay-as-you-go basis from a cloud provider  withIaaS .

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Cloud computing platforms that offer an on-demand environment for designing, testing, distributing, and managing software applications are referred to as platform as a service. PaaS was built to make it easier for developers to build web or mobile apps easily without having to worry about setting up or maintaining the underlying infrastructure of servers, storage, network, and databases.

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Serverless computing, which overlaps with PaaS, focuses on improving app features without having to continuously handle the servers and infrastructure necessary to do so. Setup, capacity planning, and server management are all managed by the cloud provider. Serverless architectures are scalable and event-driven, meaning they only use resources when a particular feature or cause occurs.

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Software as a service (SaaS) is a method of distributing software applications over the Internet on demand and generally by subscription. SaaS helps cloud providers to host and maintain software applications and underlying infrastructure, as well as handle maintenance such as software updates and security patching. Users access the application via the Internet, normally through a web browser on their phone, tablet, or PC.

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The aim of cloud computing is to allow users to take advantage of all of these technologies without needing extensive knowledge or experience in each one.