Therefore you may have unparsable structured knowledge problem, and parsers are not able to examine schema markup, so make confident your schema markup syntax is proper, here are some measures to check when troubleshooting: and Yandex. Though not a normal, it's The most usually made use of vocabularies, used by https://addons.prestashop.com/de/seo-suchmaschinenranking-optimization/31857-automatische-google-rich-snippets-json-ld-opengraph-seo.html