 page display page displays have a path and an optional menu component page displays will be the primary content for the page meaning they will be displayed in the main content area when you visit the url that corresponds to the path page displays take their arguments from the url you can embed arguments into the url using in previous versions of views this was arg for example node foo will accept urls such as node 1 foo please remember that using a placeholder makes the argument required if you wish to have an optional argument simply omit the from the path ie using page as the path requires an argument and visiting http wwwexamplecom page will not trigger the view 