Sometimes you might create a lot of subpages within your wordpress site and as a result, your dropdown navigation menu can get pretty messy. Also theres times you might create a page and not want it to automatically be added to your navigation menu. There is an easy solution if your site is built in WordPress.
Its called the Exclude Pages plugin and this plugin adds a checkbox, “include this page in menus”, which is checked by default. If you uncheck it, the page will not appear in any listings of pages (which includes, and is usually limited to, your page navigation menus).