Cloud computing is a new model for IT that provides on-demand access to shared computing resources and data over the internet. It offers significant cost savings compared to traditional IT through reduced hardware/software costs, system administration savings, and more efficient usage. Cloud computing is being rapidly adopted, with over 90% of companies currently using or planning to use it. The main types of cloud services are SaaS, IaaS, and PaaS. Virtualization is a key technology that allows software and data to be independent of hardware and accessible from various devices.