One example is, a hook allows you to add an image to the header or Display screen a product inside the footer of your site. Canonical URLs are utilised to avoid duplicate information and to indicate to search engines like google and yahoo that's the “primary” site. It is just https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html