You specify the first URL since the online search engine might have problems pinpointing which 1 need to be the main URL.  The next tutorial will provide you with tips on how to enable Canonical URLs in Prestashop 1.5. By default, PrestaShop's deep URLs (that may be, particular pages https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html