A site is a collection of publicly easily accessible, woven Websites that share a single domain. Web sites can be created and maintained by a specific, group, business or company to offer a selection of purposes. Together, all openly accessible web sites make up the World Wide Web. Internet sites come in an almost limitless range, including academic sites, information sites, discussion forums, social media websites, e-commerce websites, and so forth.
What is Pligg?

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