Web optimization suggests "Search Engine Optimization". It represents a set of strategies and very best practices directed at improving upon the visibility of a website on search engines like google.   You specify the key URL because the search engine could have problems analyzing which one ought to be the https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html