Cloud computing refers to the delivery of computing services, including storage, processing power, and software applications, over the internet. Instead of relying solely on local resources, such as personal computers or servers, cloud computing enables users to access and utilize remote computing infrastructures and services. These remote systems, often owned and maintained by cloud service providers, offer scalability, flexibility, and cost-effectiveness.

Cloud computing operates on a pay-as-you-go model, meaning users only pay for the resources they consume, similar to how we pay for utilities like electricity. It eliminates the need for upfront infrastructure investment and allows businesses, organizations, and individuals to access and use computing resources on-demand, effectively scaling up or down based on their needs.

Cloud computing encompasses various services and deployment models. Services can be categorized into three main types: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides virtualized resources like virtual machines and storage. PaaS offers development platforms and tools for building and deploying applications. SaaS delivers complete software applications accessible through web browsers or other interfaces.

Different deployment models include public cloud, private cloud, hybrid cloud, and multi-cloud. Public clouds are offered by third-party providers and available to multiple users over the internet. Private clouds are dedicated infrastructures exclusive to a single organization. Hybrid clouds combine public and private clouds, allowing organizations to leverage the benefits of both. Multi-cloud refers to using multiple cloud providers for different services or applications.

Cloud computing offers numerous advantages, such as scalability, flexibility, accessibility, and cost efficiency. It enables businesses to focus on their core competencies without the burden of maintaining complex IT infrastructures. Additionally, it facilitates collaboration, data sharing, and remote access, supporting modern work environments and digital transformation efforts.