DEFINITION OF WIKI.
Wiki is a piece of server software that allows users to freely create and edit Web page content using any Web browser. Wiki supports hyperlinks and has a simple text syntax for creating new pages and crosslinks between internal pages on the fly.
Wiki is a Web site that allows users to add and update content on the site using their own Web browser. This is made possible by Wiki software that runs on the Web server. Wikis end up being created mainly by a collaborative effort of the site visitors. A great example of a large wiki is the Wikipedia, a free encyclopedia in many languages that anyone can edit. The term "wiki" comes from the Hawaiian phrase, "wiki wiki," which means "super fast."
Advantages of using a Wiki.
A Wiki is:
Good for writing down quick ideas or longer ones, giving you mor time for formal writing and editing.
Instantly colaborative without emailing documents, keeping the group in sync.
Accesible from anywhere with a web connection.
Your archive, because every page revision is kept.
Exciting, immediate and empowering-everyone has a say.