Only canonical URLs ought to be stated as part of your sitemap, Though Google states that doing so is usually a weak canonicalization signal. When you’re syndicating or republishing written content on other web pages, this is another time to use canonical tags. If you don’t, there’s a possibility of https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html