“We currently favor JSON-LD markup. I think many of the new structured information which might be sort of come out for JSON-LD to start with. In order that’s what we prefer.” Together with the 12 snippet kinds reviewed, not all schema forms defined on schema.org are fully supported by Google. https://www.presta-addons-modules.com/en/front-office/prestashop-addthis-integration-share-content-on-social-networks.html