Different Pages of Liferay?

All sets of pages are divided into two groups: 

Public Pages :  by default, are accessible to anyone—including those
who haven't logged in to the portal.

Private Pages: by default, are only accessible to the users who belong to
the Organization or Community to which the pages belong. This means that
an Organization's private pages would only be viewable by members of the
Organization. The tabs for public and private pages have the same interface.