Breadcrumb

Breadcrumb (or breadcrumb trail) is a secondary navigation system that indicates where the user is on a site or web app. The term came from the Hansel and Gretel fairy-tale in which the main characters create a trail of breadcrumbs in order to track back to their house. Just like the tale, breadcrumb in web allows the user to find their way back from where they started. It's very useful for complex websites or applications, but not very for a single page website that has no logical hierarchy or grouping.

The following are some examples of breadcrumb.

An example here on Google Drive:

Here's an example of an e-commerce website. (mac-addict.com.au):