Ok, I have a strange duplicate content issue.

[Trigger13]

Just ran MOZ against my site and about fell of my chair, over 1k pages being flagged as having duplicate content. That's about every page on the site. I downloaded the CSV file and things got even more confusing, The URL's under "URL" and " Duplicate Page Content" area exactly the same. Am I missing something? I would expect the URL under Duplicate Page Content to show a different URL, to the page with the exact same content. Any help would be appreciated, traffic is tanking and I need to get this figured out.

Thanks,

[KeriMorgret]

I took a quick look at your account. The URL and Duplicate URL are ALMOST the same, but if you look closely, you'll see that you've got both non-www and www in there. A simple redirect at the server side to your preferred version will take care of this quite nicely. If you need a hand with that, let us know and we'll help you with the right htaccess file.

[Trigger13]

I need a hand, can you point me to the right resource?

[KeriMorgret]

http://moz.com/learn/seo/redirection can help. You're specifically looking for the "Redirecting Canonical Hostnames" section.

Briefly, google considers the following as different pages, even if they are the same.

example.com
www.example.com

Other fun things that can also happen are having all of these pages have the same content, but you can use the following URLs to get to that one piece of content:

example.com
example.com/
example.com/index.html
www.example.com
www.example.com/
www.example.com/index.html

Hope that helps!