With Kentico CMS portal engine, you can easily create pages using built-in or custom web parts. Unlike other portal engines, Kentico CMS is fully flexible and you're not limited to any particular site structure, layout or design.
Page Templates
All pages displayed to the users are based on page templates. The page template defines which web parts should be displayed, where they should be displayed and their content. The page templates can be used for a single page or they can be re-used for multiple pages.
Page templates are created by web designer. When a user creates a new page, she can choose which template will be used.
The page templates consist of web parts that are placed into web part zones defined in customizable HTML layout.

The layout can also be edited using the browser-based interface:

Master Page and Content Nesting
The master page of the web site typically contains the logo and main menu. All pages are displayed inside the master page, in the place that is defined by page placeholder. Similarly, the first-level pages can contain sub-pages (there can be up to 14 levels of nested pages). This concept allows you to quickly develop web sites without having to re-create common graphic elements on each page.
The content nesting mechanism can be also broken if necessary, so you can create e.g. a page that doesn't inherit any content from its parents or inherits only master page content.