Editing Files in a Wiki
"A wiki is a website that uses wiki software, allowing the easy creation and editing of any number of interlinked Web pages, using a simplified markup language. Wikis are often used to create collaborative websites and to power community websites. The collaborative encyclopedia Wikipedia is one of the best-known wikis." (Wikipedia). Any Google Site can become a Wiki if you invite collaborators. Google Docs have wiki-like characteristics.
Editing a Wiki - Saving the files in the correct location
The highest level should be reserved for major topics. When working on the Wiki, save files under the name of the article or topic that you are reviewing. For example, if you are writing a response to an artcle, first click until you find the article, and then select "Put page under "article name". You may have to open up a few directories before you find the article. Note in the picture below that the new file (NH - Comments...) is being saved correctly under "Rising Above the Storm". The file immediately abocve it (dsinghelps710) has been incorrectly saved since it is not a "Concept or Issue".