Learn how to hide pages by using Custom Menu’s to only show the pages you want visible on your site instead of using the plugin below.
The easiest way to install this plugin is to go to:
Plugins >> Add New
Search for 'Exclude Pages', and select 'Install'. Then select Activate
Now, go to the page you'd like to exclude (under Pages >> Edit), and deselect the option under the 'Publish'/ 'update' button to not include this in user menus... Now, select 'Publish' / 'update' and you're done!