Here is a tour of the most important help pages:
HelpForBeginners - if you are new to wikis
HelpOnNavigation - explains the navigational elements on a page
HelpOnPageCreation - how to create a new page, and how to use page templates
HelpOnUserPreferences - how to make yourself known to the wiki, and adapt default behaviour to your taste
HelpOnEditing - how to edit a page
HelpOnActions - tools that work on pages or the whole site
HelpMiscellaneous - more details, and a FAQ section
These pages contain information only important to wiki administrators and developers:
HelpOnAdministration - how to maintain a MoinMoin wiki
HelpOnInstalling - how to install a MoinMoin wiki
HelpForDevelopers - how to add your own features by changing the MoinMoin code
An automatically generated index of all help pages is on HelpIndex. See also HelpMiscellaneous/FrequentlyAskedQuestions for answers to frequently asked questions.
If you find any errors on the help pages, describe them on HelpErrata.