Illustration: You have got an e-commerce Web-site with item pages for various dimensions of a certain t-shirt.   You specify the principal URL since the online search engine may have problems deciding which a person ought to be the main URL.  The following tutorial will demonstrate tips on how to https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html