Cloud computing delivers computing resources and services over the Internet. It allows users to access applications from anywhere using a web browser. There are three main types of cloud services: Infrastructure as a Service (IaaS) which provides basic storage and networking capabilities; Platform as a Service (PaaS) which provides programming languages and services for developing applications; and Software as a Service (SaaS) which provides ready-to-use software applications to end users. Cloud computing provides advantages for both consumers and enterprises by reducing costs and improving productivity, reliability and flexibility compared to traditional computing models.