Schema.org is a set of vocabulary (or schemas) used to use structured data markup to Web content and written content. Correctly making use of schema can improve SEO results as a result of rich snippets. 3. Hold your browser open: Your Website browser window should continue to be open through https://addons.prestashop.com/pt/seo-referenciamento-natural/31857-rich-snippets-automaticos-json-ld-opengraph-seo.html