A siloed website architecture is best because this helps reinforce
topical relevance of pages on your site and arranges them in a hi-
erarchical structure that Google can understand. It also helps rein-
force topical focus.
You run into a site that has orphaned pages everywhere and within
the sitemap.Make sure at least one link from the site links to every other poten-
tial page on your site. If the page is not part of your site, either de-
lete it entirely or noindex it.Common Issue
Solution
GOOGLE WEBMASTER GUIDELINES: EVERYTHING YOU NEED TO
KNOW & UNDERSTAND