Instance: You might have an e-commerce Web-site with products webpages for different dimensions of a selected t-shirt. So To put it briefly, I entered an if-then assertion, wherever I advised the template to not include the canonical tag for the merchandise with the ID nrs specified. For all those products https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html