Click the "Add new website page" button to reach the friendly URL creation form. It's A few fields: Canonical URLs are employed to stay away from duplicate articles and to point to search engines that's the “primary” webpage. It is just an indication within the webpage code to indicate to https://addons.prestashop.com/nl/seo-zoekmachineoptimalisatie-vermelding/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html