Case statement for blog template to build accessible breadcrumbs - https://www.shopify.com/partners/blog/breadcrumb-navigation

accessible-breadcrumbs-case-blog.liquid

{% when 'blog' %}

    {% if current_tags %}
      <li>{{ blog.title | link_to: blog.url }}</li>
      <li>
        {% capture tag_url %}{{blog.url}}/tagged/{{ current_tags | join: "+" }}{% endcapture %}
        <a href="{{ tag_url }}" aria-current="page">{{ current_tags | join: " + " }}</a>
      </li>
    {% else %}
      <li>
        <a href="{{ blog.url }}" aria-current="page">{{ blog.title }}</a>
      </li>
    {% endif %}