SEO 導覽產品 BreadcrumbList
<script type="application/ld+json"> { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{ "@type": "ListItem", "position": 1, "name": "第一層商品種類", "item": "第一層商品網址" }, ,{ "@type": "ListItem", "position": 2, "name": "第二層商品種類", "item": "第二層商品網址" } ,{ "@type": "ListItem", "position": 3, "name": "第三層商品種類", "item": "第三層商品網址" } ] } </script>