WikiWikiWeb is an "open-editing" system where the emphasis is on the authoring and collaboration of documents rather than the simple browsing or viewing of them. The name "wiki" is based on the Hawaiian term "wiki wiki", meaning "quick" or "super-fast". The basic concept of a WikiWikiWeb (or "wiki") is that (almost) anyone can edit any page. While at first this sounds like a recipe for complete anarchy, the truth is that sites using this system have developed surprisingly complex and rich communities for online collaboration and communication. Yes, it's possible for someone to go and destroy everything on a page, but it doesn't seem to happen often. And, many systems (including this one) have built-in mechanisms to restore content that has been defaced or destroyed.
The point of the system is to simply make it as quick, easy and rewarding as possible to create or edit online content.
Using any standard Web browser, a person can edit (almost) any page on the system using relatively simple text formatting rules. Creating a link to a new or existing page simply involves putting the word or phrase that will be your link text inside [[double square brackets]] to reference and serve as a title for the target page. In the process of creating the link you're creating the new page, if it doesn't already exist. On some sites (depending on the configuration of PmWiki), a link can also be created by entering a WikiWord -- a word consisting of two or more capitalized words joined together.
It's not necessary to learn all of the formatting rules; others will often come in and reformat things for you. After all, anyone can edit! You can see some of the recent changes that others have posted to this site.
If you want to learn more about the WikiWikiWeb concept, try some of these Web sites: