Menus are a collection of links (menu items) used to navigate a website. The menus currently available on your site are displayed below. Select a menu from this list to manage its menu items.

Navigation
The navigation menu is provided by Drupal and is the main interactive menu for any site. It is usually the only menu that contains personalized links for authenticated users, and is often not even visible to anonymous users.
Primary links
Primary links are often used at the theme layer to show the major sections of a site. A typical representation for primary links would be tabs along the top.
Secondary links
Secondary links are often used for pages like legal notices, contact details, and other secondary navigation items that play a lesser role than primary links