Rich Snippets lets you Show additional specifics of your site's webpages within the search engine results. I don’t would like to add it manually to every article”. And you can make this happen for many other Schema fields, not just your titles. Override non-empty fields - when it is enabled https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html