Cloud computing refers to a model of network computing where applications and services run on remote servers that are accessed over the internet. With cloud computing, computing resources such as processing power, storage, and applications are provided as an online service rather than being located on a local device. Key benefits of cloud computing include reduced costs, flexibility and scalability, as computing resources can be dynamically allocated on demand. Popular cloud services include software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS). Major cloud providers include Amazon Web Services, Google Cloud, Microsoft Azure, IBM Cloud, and Oracle Cloud.