hugo/docs/content/en/methods/menu-entry/URL.md

title	description	categories	keywords	action
URL	Returns the relative permalink of the page associated with the given menu entry, else its `url` property.			related returnType signatures string MENUENTRY.URL

For menu entries associated with a page, the URL method returns the page's RelPermalink, otherwise it returns the entry's url property.

<ul>
  {{ range .Site.Menus.main }}
    <li><a href="{{ .URL }}">{{ .Name }}</a></li>
  {{ end }}
</ul>