Optimising website navigation. Why directory structure is so important?
Utilize a directory structure that organizes your content well and is easy for visitors to know where they’re at on your site. Try using your directory structure to indicate the type of content found at that URL.
Avoid such things as having deep nesting of subdirectories like …/dir1/dir2/dir3/dir4/dir5/dir6//page.htm and using directory names that have no relation to the content in them. Many sites with indexing problems and lack of representation in the search engines are usually suffering from an inefficient internal page linking structure.
If a page is not accessible by a link from somewhere, it won’t be ‘seen’ by the search engines.