Improve your page rank using sitemaps
Google sitemaps technology is to correct your page / site errorsLikewise - 404 , 403 and other .These error may reduce your page rank .Google sitemaps notify any error on your site .It provides a complete report on number of times site crawled , you page / siterank on Google search engine .If you correct errors on your site.This would improve your page rank on Google search engines.Google search