You specify the key URL because the search engine may have trouble identifying which one particular should be the main URL.  The next tutorial will tell you about how you can help Canonical URLs in Prestashop one.five. The JS redirect appears like a little bit of a messy condition, https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html