Take note that When your keep has now been indexed by Google or almost every other internet search engine, it would just take some time for your improvements to look during the search engine results... you might have to be patient!   You specify the main URL as the search https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html