Cloud computing allows businesses and individuals to store, manage, and process data over the internet rather than on local servers. Cloud services like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud offer scalable solutions for businesses of all sizes. There are three main types of cloud computing: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Cloud security is a major focus, protecting sensitive data from cyber threats.