If yes, Set SITEMAPLIST = on, and add the "what" and "use to..." description for the site map. Make sure to list only links that include the name of the web, e.g. Main.Topic links.
Set SITEMAPLIST = on
Set SITEMAPWHAT = Welcome to TWiki... Users, Groups, Offices - tour this expandable virtual workspace.
Set SITEMAPUSETO = ...get a first-hand feel for TWiki possibilities.
Exclude web from a web="all" search: (Set to on for hidden webs)