What?
Navigation is the layout and the method of traversing a website.
Things that need to be considered when doing navigation are
- links
- check spelling
- file extensions
- the code
- all the same links on the different pages lead to the same thing
- that the links actually go somewhere
- that the site has a logical layout
- the links are concisely labelled
How to test?
Make sure the code is written correctly
Check file in file manager to make sure the pages are there.
Upload the site and check the links and navigation that way to make sure everything works.
Get someone else to test your uploaded site to have a different opinion and point of view.
Why?
Navigation must be correct for site to be usable.
Layout should be logical to increase the usability of the site.
Further information on this and related topics can be found at Web site testing – WHAT, HOW, WHY?