A breadcrumb trail on a page indicates the page's position in the site hierarchy. A user can navigate all the way up in the site hierarchy, one level at a time, by starting from the last breadcrumb in the breadcrumb trail.
Google Search uses breadcrumb markup in the body of a web page to categorize
the information from the page in search results. Often, as illustrated in
following use cases, users can arrive at a page from very different types of
search queries. While each search may return the same web page, the breadcrumb
categorizes the content within the context of the Google Search query. The page
ancillaryjustice.html might display the following breadcrumb trails
depending upon the search context:
Example 1: Search query for book title, Ancillary Justice
Example 2: Search query for a year and genre-based award, 2014 Nebula Award best novel
Example 3: Multiple breadcrumb trail
Insert the HTML breadcrumb block within the page as part of the visual design. The HTML breadcrumb trail for the Guidelines example might be:
<ol> <li> <a href="http://www.example.com/books">Books</a> › </li> <li> <a href="http://www.example.com/sciencefiction">Science Fiction</a> </li> <li> <a href="http://www.example.com/books/sciencefiction/awardwinners">Award Winners</a> </li> <ol>
In addition to the
general structured data guidelines,
Social Profile markup should create one or more breadcrumb trails without a
crumb for the target page if it's possible to find the page within a larger set
of search results. Continuing the previous examples, because the search query
award winning science fiction novels would find many other pages in addition
ancillaryjustice.html, you might include the breadcrumb trail to reflect the
broader search category:
Google Search recognizes the following properties of a BreadcrumbList.
The URL to the webpage that represents the breadcrumb.
The title of the breadcrumb displayed for the user.
The position of the breadcrumb in the breadcrumb trail. Position 1 signifies the beginning of the trail.