There's different use cases. If you just want to read some content, try to see if you can find it on the wiki. If there's information missing or in a weird place, please let the WebCo know.

If you want to contribute, please take into account the namespace in which a page is located in. This is important because the namespace controls who can see and edit what. Some pages are meant for everyone in the whole wide world and some pages are only meant to be seen by a select set of eyes.

The DokuWiki documentation is a good start, especially he page on syntax, if you want to start writing something for the wiki.