Cloud computing refers to the on-demand, seamless access to computing resources such as servers, storage, databases, networking, software, analytics and intelligence over the Internet (the cloud) on a pay-per-use pricing model. It marks a paradigm shift from traditional on-premises infrastructure storage to remote cloud-based storage facilities and relies heavily on virtualization and automation technologies. 

Instead of buying, owning and maintaining physical data centers and servers, organizations access a virtual pool of shared resources on an as-needed basis from a cloud service provider. This lowers operating costs, increases productivity with greater agility and flexibility, and improves scalability with higher economies of scale.

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