Breadcrumb Schema.org Markup Microdata

Microdata

<ol vocab="http://schema.org/" typeof="BreadcrumbList">
  <li property="itemListElement" typeof="ListItem">
    <a property="item" typeof="WebPage"
        href="https://example.com/books">
      <span property="name">Books</span></a>
    <meta property="position" content="1">
  </li>
  ›
  <li property="itemListElement" typeof="ListItem">
    <a property="item" typeof="WebPage"
        href="https://example.com/books/sciencefiction">
      <span property="name">Science Fiction</span></a>
    <meta property="position" content="2">
  </li>
  ›
  <li property="itemListElement" typeof="ListItem">
    <a property="item" typeof="WebPage"
        href="https://example.com/books/sciencefiction/awardwinners">
      <span property="name">Award Winners</span></a>
    <meta property="position" content="3">
  </li>
</ol>
<ol vocab="http://schema.org/" typeof="BreadcrumbList">
  <li property="itemListElement" typeof="ListItem">
    <a property="item" typeof="WebPage"
        href="https://example.com/literature">
      <span property="name">Literature</span></a>
    <meta property="position" content="1">
  </li>
  ›
  <li property="itemListElement" typeof="ListItem">
    <a property="item" typeof="WebPage"
        href="https://example.com/literature/speculativefiction">
      <span property="name">Speculative Fiction</span></a>
    <meta property="position" content="2">
  </li>
</ol>

      

Guida completa: https://www.evemilano.com/breadcrumb-seo/