UI - Breadcrumb

About

A breadcrumb trail on a page indicates the page's position in the site hierarchy.

It permits to categorize the information.

Articles Related

Metadata

A Resource (Web Page) - Type (Structured Data | Metadata )

Example in Web Page Metadata - Json-Ld syntax

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [{
    "@type": "ListItem",
    "position": 1,
    "name": "Books",
    "item": "https://example.com/books"
  },{
    "@type": "ListItem",
    "position": 2,
    "name": "Authors",
    "item": "https://example.com/books/authors"
  },{
    "@type": "ListItem",
    "position": 3,
    "name": "Ann Leckie",
    "item": "https://example.com/books/authors/annleckie"
  },{
    "@type": "ListItem",
    "position": 4,
    "name": "Ancillary Justice",
    "item": "https://example.com/books/authors/ancillaryjustice"
  }]
}
</script>

More … https://developers.google.com/search/docs/data-types/breadcrumb

Example of appearance on Google Search

HTML

Breadcrumd with:

• a nav element
• a heading (h2)
• and a list (ul)

<nav>
  <h2>You are here:</h2>
  <ul id="navlist">
    <li><a href="/">Main</a> →</li>
    <li><a href="/products/">Products</a> →</li>
    <li><a href="/products/dishwashers/">Dishwashers</a> →</li>
    <li><a>Second hand</a></li>
  </ul>
</nav>

Ref