From time to time the back-end CMS system has restrictions that drive you to have a reliable set of components on all pages. e.g. all pages need to use a rel=canonical tag, whether or not it’s to level to alone. Canonical tags are usually not the one solution to declare https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html