Page Security allows you to set permission for sections, pages or even whole sites forcing the user to authenticate to gain access to that content.
Securing a particular page by giving authorisation to a certain group will allow only a logged-in member of that group to see the page. Security cascades through the site and also applies to "children" of the secured page, making it easy to secure whole sections of your website from one, easy-to-use interface.
What are the Benefits?
How do I use?
You will need to create groups in the administration area then go to the edit page area and check the appropriate group for that page. See How