This forces clients to go to the products's site and decide on a combination, rather than only including the default 1 to the cart. Take note that products without having combination will even now have an "Include to cart" button during the category web page. To put it simply, by https://addons.prestashop.com/fr/seo-referencement-naturel/30904-balises-hreflang-automatiques-et-balises-canoniques-seo.html