You specify the first URL since the internet search engine might have problems pinpointing which a single ought to be the first URL.  The following tutorial will provide you with tips on how to enable Canonical URLs in Prestashop one.5. Redirect towards the canonical URL. A presented PrestaShop website https://addons.prestashop.com/es/seo-posicionamiento-buscadores/31857-google-rich-snippets-automatico-json-ld-opengraph-seo.html