Cloud means a grid
of computers serving as a service-oriented architecture to
deliver software and data. Most websites and server-based applications run on
particular computers or servers. The applications are stored on these cloud
and accessed by the user without knowing server configurations. A lot of the
software that people use nowadays is completely web-based. For example, if you
are hosting your website on a local server or from your PC, you must usually
select a particular operating system (Windows/Linux/Mac), to determine what
software you can run on that particular server. If your site is being hosted
in the cloud, there is no need to do that. You can run Windows and Linux
programs side by side.