A Wiki is a collaborative site, anyone can contribute and share:
Edit any page by pressing Edit at the top or the bottom of the page
Create a link to another page with joined capitalized words (like WikiSandBox) or with [[words in double-brackets]]
- Search for page titles or text within pages using the search box at the top of any page
See HelpForBeginners to get you going, HelpContents for all help pages.
To learn more about what a WikiWikiWeb is, read about WhyWikiWorks and the WikiNature. Also, consult the WikiWikiWebFaq.