Wiki is hawaiian and means fast. It looks weird at first, but after you get used to it, it makes things considerably easier.

Here is an introductory link to a page on a different wiki website that explains what a wiki is: Meatball:WhatIsaWiki.

Here is an even quicker introduction (specific to the software on this website):

If you are wondering why a wiki can work socially, one answer is at WhyWikiWorks.

More advanced usage