There is a theory that any Wiki which has more than 10 contributors, but less than 100 will eventually become a jungle of pages that nobody can make heads and tails of. With less, the people usually know it well enough to understand the structure, but with more than 100 active users Wiki Gardeners will appear.
A Wiki Gardener is a person who goes around the wiki, correcting typos here, rearranging things to be more readable there.
In general, good Wiki Gardeners are liked and respected, since they have the magical ability to take a jumble of pages and create good, readable text out of them.
Anyone can be a Wiki Gardener: If you see a typo or a spelling mistake, feel free to correct it! If you feel up to it, rearrange a page, or split a long page to smaller pages, or if you think some page belongs to some category, add a link to it. If you make a mistake, don't worry about it, since everything you do can be restored.