Friendly URLs are to generally be set during the configuration website page of each products, class, or static content website page. This generation web page is simply useful for some automatic webpages, and more often than not you will not have to bother with these. 8 fields can be found https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html