A breadcrumb (or "breadcrumb trail") is a secondary navigation tool to help users find their way around a website. Breadcrumbs typically appear as a "trail" of links at the top of the page to indicate to the user where the page is in the hierarchy of pages.

In terms of usability, breadcrumbs reduce the number of actions a website visitor needs to take in order to get to a higher-level page, and they improve the findability of website sections and pages.

Understanding Breadcrumbs