What Is Schema Markup and Why Does It Matter for SEO?
Schema markup is structured data that you add to your web page's HTML using JSON-LD format. It tells Google exactly what your content is and what it means, not just what words appear on the page. Instead of Google guessing whether your page is an article, product, recipe or event, schema markup states it explicitly.
The SEO benefit is significant. Pages with correct schema markup are eligible for rich results in Google Search, which means your listing can show star ratings, prices, images, FAQs, event dates, and more directly in the search results. These enhanced listings have much higher click-through rates than plain blue links.
Why JSON-LD Is the Right Format
Google supports three structured data formats: JSON-LD, Microdata, and RDFa. JSON-LD is Google's officially recommended format because it sits inside a script tag and does not mix with your HTML. This makes it easy to add, edit, and validate without changing your page layout or risking HTML errors. Our free schema validator only checks JSON-LD because it is what Google uses for all rich result eligibility checks.