Illustration: You may have an e-commerce Web-site with product internet pages for various dimensions of a selected t-shirt. 8 fields are offered by default, and each is accompanied by a listing of available keywords. Some keyword phrases are necessary and they are indicated by using a "*". Canonical URL's provide https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html