Welcoming URLs are to get established in the configuration web site of each products, class, or static content website page. This generation webpage is only handy for many automatic webpages, and more often than not you will not have to bother with these.   You specify the main URL since https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html