Page Templates are used to display different content or layouts for Pages. For example, you might have a Page Template to display a special home page layout, a sitemap, or a layout without any sidebars. You can use different Page Templates for different Pages.
Using a Page Template
If your theme comes with Page Templates, you will see the Template drop down in the Page Attributes box on the Add New or Edit Page screen. Select the layout you wish to use for that page and click Publish or Update to save your changes. The Page will now be displayed differently from other Pages.