Instance: You may have an e-commerce Web-site with item pages for different dimensions of a certain t-shirt. By default, PrestaShop's deep URLs (which is, certain pages rather then on the net the domain name) are uninformative to both shoppers and search engines like google and yahoo: a URL for instance https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html