Priority
High
Why it matters: The way users navigate through your product has a direct influence on whether they will accomplish their goals there.
How to test it: Check your documentation on the site's information architecture. Make sure that proper navigation is present on every page, it doesn’t change or disappears in any place. Before diving into visual design, try 'card sorting' or 'tree testing' methods to ensure your information architecture pathways are as intuitive as possible. More on 'card sorting' method here:
Check this article about ’tree testing’: