Websites are web applications intended to be consumed by a browser. They respond to HTTP requests with HTML documents, static assets, or responses intended to be processed by scripts executed within a browser.

Websites interact with web services. They never communicate with databases directly.

Websites are responsible to interpret user provided parameters (via GET, POST and Cookie) and generate a response that
  1. Applies to the demand of the requesting user
  2. Complies with defined access rights and roles of the requesting user
  3. Matches the needs of the browser software and the device the browser software is running on
Websites are PHP classes that are derived from CWebsite which is derived from CWebApplication.