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HTML/CSSIntermediate#storage#javascript
HTML/CSSAdvanced#seo#html
What is structured data / Schema.org markup used for?
It's JSON-LD or microdata added to HTML that helps search engines understand content context (like articles, products, reviews) enabling rich snippets in search results.
Example
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@type": "Product",
"name": "Running Shoe",
"offers": {"@type": "Offer", "price": "59.99"}
}
</script>