Breadcrumbs actually means breadcrumbs. So breadcrumb navigation. Because breadcrumbs are navigation elements that are often integrated in the upper part of the website. These breadcrumbs make it relatively easy to navigate within the website structure.
An example could look like this:
By the way, the term breadcrumb comes from the fairy tale "Hansel and Gretel", who marked their way back home with crumbs. Breadcrumbs make it very easy to find your way back to the respective pages and not get lost in the website forest.