A breadcrumb trail on a page indicates the page's position in the site hierarchy, and it may help users understand and explore a site effectively. How to add structured data · Examples · Guidelines · Structured data type definitions
Google uses structured data to understand the content on the page and show that content in a richer appearance in search results, which is called a rich result.
The important thing about breadcrumb structured data to Google is that it's visible on the page. If it's not entirely visible on the page, this is something ...
A BreadcrumbList is an ItemList consisting of a chain of linked Web pages, typically described using at least their URL and their name, and typically ending ...