A website is a collection of openly available, interlinked Websites that share a single domain. Sites can be produced and also kept by a specific, group, service or company to serve a selection of purposes. With each other, all publicly accessible websites comprise the Net. Sites are available in an almost limitless range, including instructional websites, news sites, forums, social networks sites, ecommerce sites, and so forth.
What is Pligg?

Pligg is an open source content management system that lets you easily create your own user-powered website.