Website positioning means "Search Engine Optimization". It signifies a set of methods and best tactics targeted at enhancing the visibility of a website on search engines like google.   You specify the first URL because the search engine might have difficulty analyzing which a person should be the main URL.  https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html