Hi akaoma

A Supersite consists of one HTML file for the whole site so keywords, description and and title and meta tags are taken from the first page of the site. Search Engines still work exactly as normal with Supersites, and will index all your content, but that they might jump to the home page of the Supersite when following a search engine link.
From:

http://support.xara.com/index.php?/K...0/0/supersites