This is important stuff. One of the keys to grasping Drupal is to understand that creating content is just a small part of the picture. Creating a node is simple enough; telling users how to get to any node, via links in menus or elsewhere, is the start of building a site.

-- coming later --

The Menus administration form is one place where you can create menu items (see Working with Menus: Administration Page).

There's another way to create a menu item: when you create or edit a node, you can create a menu item for it on the fly.

For example, you create a node with company information, and want a link to that node to appear in a menu called 'site menu'. You could create the node, head to the Menus administration form, and create a new menu item within the menu called 'site menu'.

Menus are the key to your site – they're the way by which visitors get at your content.

A menu is a list of links to content. Menus can appear in a horizontal line at the top of your pages, as with many web site designs. Or they can appear along the sides in blocks, another common design.

A specific link in a menu – a "menu item" – can link to a specific node. Or, calling on the full power of the database behind your site, it can pull up a list of nodes based on some criterion.