Page Design Definitions
Unique page design:
A unique page is one whose design and layout is unlike any other page. Design and layout includes: photo and text position placement, page banner, and other technical features like slide shows, fonts, and colors.
Main page vs sub page:
A page is considered a main page when it is shown on the top level of the site’s menus. Other pages are considered sub pages.
Duplicate page design:
A duplicate page looks exactly like another page in term of layout, elements placement, and elements sizes except for its textual content and photos. Example of duplicate pages are: company employee directory pages and product or service pages.