Cloud infrastructure offers the same capabilities as physical infrastructure but can provide additional benefits like a lower cost of ownership, greater flexibility, and scalability.
Software as a Service (aka cloud application services), is the most widely used type of cloud service. Popular for business as SaaS companies deliver strong customer experience through information exchange and services, SaaS takes a large part of the IT burden off the hands of a business.
SaaS employs the internet to provide distributed applications and services, eliminating the need for clients to download any software. With SaaS, a cloud vendor fully manages the entire offering: applications, data, runtime, middleware, operating systems, services, storage, networking, and virtualization.