Help:Navigation

When viewing any page on a MediaWiki wiki, you'll find three main navigation elements:

1. The sidebar on the left gives you access to important pages in the wiki such as Recent changes or Upload file.
2. At the top of the page are links (often called tabs) which relate to the page currently displayed: its associated discussion page, the version history, and—most notably—the edit link.
3. In the top right corner you'll find user links; as an anonymous user, you'll see a link to create an account or log in (they are the same page). As a logged-in user you have a collection of personal links, including ones to your user page and preferences.

You've got it in one. Couldn't have put it bteter.

Page Tabs

The page tabs are displayed at the top of the page to the right of the site logo (if using the default MonoBook skin). These tabs allow you to perform actions or view pages that are related to the current page. The available default actions include: viewing, editing, and discussing the current page. The specific tabs displayed on your pages depend on whether or not you are logged into the wiki and whether you have sysop (administrator) privileges on the wiki. On special pages only the namespace tab is displayed.

Default for all users

• “namespace” (page, help, special page, template, user page etc.)
• “discussion”
• “edit” (may read “view source” if anonymous editing is disabled, the page is in the MediaWiki: namespace, or the page is protected)
• “history”

Extra tabs for logged-in users

• “move”
• “watch”

That's a psoitng full of insight!