Understanding WCAG2.0

It is desirable that "bread crumb (or topic pass)" exists. Also, if you have a parent site such as a satellite site, the link to the parent site also helps you understand the "current location" in a broad sense. For example, an undergraduate site with a separate university site has a link to that university.

Principle Operable User interface components and navigation must be operable.
Guideline Navigable Provide ways to help users navigate, find content, and determine where they are.
Criterion Location
(2.4.8 AAA)
Information on the position of the user in the set of web pages can be used.

URL of Techniques for WCAG 2.0