Organizing content on a website can be complex in my experience it often doesn’t get enough thought my most website owners and webmasters. Google is saying this is worth your effort. Just something to think about!
Straight From Google:
One URL, one set of content.
In an ideal world, there’s a one-to-one pairing between URL and content: each URL leads to a unique piece of content, and each piece of content can only be accessed via one URL. The closer you can get to this ideal, the more streamlined your site will be for crawling and indexing. If your CMS or current site setup makes this difficult, you can use the rel=canonical element to indicate the preferred URL for a particular piece of content.