Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • SEO Q&A
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • Case Studies
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      Find your plan
    • Blog
    • Why Moz
      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • Case Studies

        Explore how Moz drives ROI with a proven track record of success.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Intermediate & Advanced SEO
    4. Duplicate Content www vs. non-www and best practices

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    Duplicate Content www vs. non-www and best practices

    Intermediate & Advanced SEO
    5
    5
    6837
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • EnvoyWeb
      EnvoyWeb last edited by

      I have a customer who had prior help on his website and I noticed a 301 redirect in his .htaccess

      Rule for duplicate content removal : www.domain.com vs domain.com

      RewriteCond %{HTTP_HOST} ^MY-CUSTOMER-SITE.com [NC]
      RewriteRule (.*) http://www.MY-CUSTOMER-SITE.com/$1 [R=301,L,NC]

      The result of this rule is that i type MY-CUSTOMER-SITE.com in the browser and it redirects to www.MY-CUSTOMER-SITE.com

      I wonder if this is causing issues in SERPS.  If I have some inbound links pointing to www.MY-CUSTOMER-SITE.com and some pointing to MY-CUSTOMER-SITE.com, I would think that this rewrite isn't necessary as it would seem that Googlebot is smart enough to know that these aren't two sites.

      -----Can you comment on whether this is a best practice for all domains?
      -----I've run a report for backlinks.  If my thought is true that there are some pointing to www.www.MY-CUSTOMER-SITE.com and some to the www.MY-CUSTOMER-SITE.com, is there any value in addressing this?

      1 Reply Last reply Reply Quote 0
      • ThompsonPaul
        ThompsonPaul last edited by

        _If I have some inbound links pointing to www.MY-CUSTOMER-SITE.com and some pointing to MY-CUSTOMER-SITE.com, I would think that this rewrite isn't necessary as it would seem that Googlebot is smart enough to know that these aren't two sites. _

        Absolutely NOT, unfortunately. Search engines specifically consider these two versions of the URLS to be two totally different sites. The redirect rule you currently have is specifically in place to correct this problem so the two versions of your site (in the eyes of the engines) aren't competing with each other.

        The previous developer knew what he was doing. Leave the redirect as-is. Just be careful that all links you create use the primary version of the URL - you'll retain a bit more "link juice" that way than having them go through the redirect. (i.e. always write links as www.my-customer-site.com/whatever for links in content, menus, incoming links where possible)

        Paul

        P.S. For proof that search engines consider those URLs different sites, Google's own Webmaster Tools has a setting where you can tell Google which version of the site URL you want to be primary. Much better to do this with a proper 301-redirect though so that you can tell ALL search engines, not just Google.

        1 Reply Last reply Reply Quote 3
        • RohitPalit
          RohitPalit last edited by

          -----Can you comment on whether this is a best practice for all domains?

          Yes, it is.

          -----I've run a report for backlinks.  If my thought is true that there are some pointing to www.www.MY-CUSTOMER-SITE.com and some to the www.MY-CUSTOMER-SITE.com, is there any value in addressing this?

          You shouldn't worry about that at all. 301's are just fine. They don't only redirect visitors, search engines like Google also follow them to pass authority signals to the redirected page.

          1 Reply Last reply Reply Quote 0
          • Oren.
            Oren. last edited by

            You want to commit to one and put a 301 on the other.  Googlebot should be smart enough, but it isn't really.  Some things aren't best to be left to chance.

            Here's the Moz 301 redirect article: http://moz.com/learn/seo/redirection

            Edit: Here's another article about www.mysite.com vs mysite.com http://www.stepforth.com/resources/web-marketing-knowledgebase/non-www-redirect/#.UlbGl1Cko2s

            1 Reply Last reply Reply Quote 2
            • RebekahMay
              RebekahMay last edited by

              Ideally one version of the site should redirect to the other version using a 301 to transfer any link juice from one version of the domain to the other.  In an issue where both versions have links pointing to them, the best solution is to see which version has the highest domain authority and the most links and use that as your preferred domain.

              1 Reply Last reply Reply Quote 0
              • 1 / 1
              • First post
                Last post

              Got a burning SEO question?

              Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


              Start my free trial


              Browse Questions

              Explore more categories

              • Moz Tools

                Chat with the community about the Moz tools.

              • SEO Tactics

                Discuss the SEO process with fellow marketers

              • Community

                Discuss industry events, jobs, and news!

              • Digital Marketing

                Chat about tactics outside of SEO

              • Research & Trends

                Dive into research and trends in the search industry.

              • Support

                Connect on product support and feature requests.

              • See all categories

              Related Questions

              • Caffeine_Marketing

                We are redirecting http and non www versions of our website. Should all versions http (non www version and www version) and https (non www version) should just have 1 redirect to the https www version?

                We are redirecting http and non www versions of our website. Should all versions http (non www version and www version) and https (non www version) should just have 1 redirect to the https www version? Thant way all forms of the website are pointing to one version?

                Intermediate & Advanced SEO | | Caffeine_Marketing
                0
              • GhillC

                Same site serving multiple countries and duplicated content

                Hello! Though I browse MoZ resources every day, I've decided to directly ask you a question despite the numerous questions (and answers!) about this topic as there are few specific variants each time: I've a site serving content (and products) to different countries built using subfolders (1 subfolder per country). Basically, it looks like this:
                site.com/us/
                site.com/gb/
                site.com/fr/
                site.com/it/
                etc. The first problem was fairly easy to solve:
                Avoid duplicated content issues across the board considering that both the ecommerce part of the site and the blog bit are being replicated for each subfolders in their own language. Correct me if I'm wrong but using our copywriters to translate the content and adding the right hreflang tags should do. But then comes the second problem: how to deal with duplicated content when it's written in the same language? E.g. /us/, /gb/, /au/ and so on.
                Given the following requirements/constraints, I can't see any positive resolution to this issue:
                1. Need for such structure to be maintained (it's not possible to consolidate same language within one single subfolders for example),
                2. Articles from one subfolder to another can't be canonicalized as it would mess up with our internal tracking tools,
                3. The amount of content being published prevents us to get bespoke content for each region of the world with the same spoken language. Given those constraints, I can't see a way to solve that out and it seems that I'm cursed to live with those duplicated content red flags right up my nose.
                Am I right or can you think about anything to sort that out? Many thanks,
                Ghill

                Intermediate & Advanced SEO | | GhillC
                0
              • kayl87

                Is single H1 tag still best practice?

                Hi Guys, Is having a single h1 tag still best practice for SEO? Guessing multiple h1 tags dilute the value of the tag and keywords within the tag. Thoughts? Cheers.

                Intermediate & Advanced SEO | | kayl87
                0
              • cinzia09

                Same product in different categories and duplicate content issues

                Hi,I have some questions related to duplicate content on e-commerce websites. 1)If a single product goes to multiple categories (eg. A black elegant dress could be listed in two categories like "black dresses" and "elegant dresses") is it considered duplicate content even if the product url is unique? e.g www.website.com/black-dresses/black-elegant-dress duplicated> same content from two different paths www.website.com/elegant-dresses/black-elegant-dress duplicated> same content from two different paths www.website.com/black-elegant-dress unique url > this is the way my products urls look like Does google perceive this as duplicated content? The path to the content is only one, so it shouldn't be seen as duplicated content, though the product is repeated in different categories.This is the most important concern I actually have. It is a small thing but if I set this wrong all website would be affected and thus penalised, so I need to know how I can handle it. 2- I am using wordpress + woocommerce. The website is built with categories and subcategories. When I create a product in the product page backend is it advisable to select  just the lowest subcategory or is it better to select both main category and subcategory in which the product belongs? I usually select the subcategory alone.  Looking forward to your reply and suggestions. thanks

                Intermediate & Advanced SEO | | cinzia09
                1
              • nchlondon

                Directory with Duplicate content? what to do?

                Moz keeps finding loads of pages with duplicate content on my website. The problem is its a directory page to different locations. E.g if we were a clothes shop we would be listing our locations: www.sitename.com/locations/london www.sitename.com/locations/rome www.sitename.com/locations/germany The content on these pages is all the same, except for an embedded google map that shows the location of the place. The problem is that google thinks all these pages are duplicated content. Should i set a canonical link on every single page saying that www.sitename.com/locations/london is the main page? I don't know if i can use canonical links because the page content isn't identical because of the embedded map. Help would be appreciated. Thanks.

                Intermediate & Advanced SEO | | nchlondon
                0
              • morg45454

                Robots.txt - Do I block Bots from crawling the non-www version if I use www.site.com ?

                my site uses is set up at http://www.site.com I have my site redirected from non- www to the www in htacess file. My question is... what should my robots.txt file look like for the non-www site? Do you block robots from crawling the site like this? Or do you leave it blank? User-agent: * Disallow: / Sitemap: http://www.morganlindsayphotography.com/sitemap.xml Sitemap: http://www.morganlindsayphotography.com/video-sitemap.xml

                Intermediate & Advanced SEO | | morg45454
                0
              • BobGW

                PDF for link building - avoiding duplicate content

                Hello, We've got an article that we're turning into a PDF. Both the article and the PDF will be on our site. This PDF is a good, thorough piece of content on how to choose a product. We're going to strip out all of the links to our in the article and create this PDF so that it will be good for people to reference and even print. Then we're going to do link building through outreach since people will find the article and PDF useful. My question is, how do I use rel="canonical" to make sure that the article and PDF aren't duplicate content? Thanks.

                Intermediate & Advanced SEO | | BobGW
                0
              • RobertFisher

                Www and non www how to check it.......for sure. No, really, for absolutely sure!!

                Ok, I know it has been asked, answered, and re-asked but I am going to ask for a specific reason. As you know, anyone who is a graphic designer or web developer is also an expert in SEO....Right??? 
                I am dealing with a client who is clinging to a developer but wants us to do the SEO on a myriad of sites. All connect to his main site via links, etc. The main site was just redeveloped by a developer who claims extensive SEO knowledge. The client who referred me to them is getting over twenty times the organic clients they are and is in a JV with the new client. Soooo, I want to show them once and for all they are wrong on the www. versus non-www. When I do a Site:NewClient.com in Google I get a total of 13 www.newclient.com url's and 20 newclient.com url's without the www. Oddly, none are dupes of the other. So, where the www.NewClient/toy-boat/ is there, the other might be non www.  NewClient/toy-boat/sailing-green/ Even the contact page is in the www.NewClient/contact versus the non www of NewClient/Contact-us/ But, both pages seem to resolve to the non www. (A note here is that I originally instructed the designer to do non www to www. because the page authority was on the www.NewClient and he did opposite. With pages that are actually PDF files, if you try to use the www.NewClient/CoolGuy.pdf it comes up 404. When I check our sites, using Site:We-Build-Better.com ours return all www.We-Build-better/ url's. So, any other advice on how to insure these correct or incorrect? Oddly, we have discovered that sometimes in OSE, even with a correct canonical redirect it shows one without authority and the other with....we have contacted support. Come on mozzers, hook a brother up!

                Intermediate & Advanced SEO | | RobertFisher
                0

              Get started with Moz Pro!

              Unlock the power of advanced SEO tools and data-driven insights.

              Start my free trial
              Products
              • Moz Pro
              • Moz Local
              • Moz API
              • Moz Data
              • STAT
              • Product Updates
              Moz Solutions
              • SMB Solutions
              • Agency Solutions
              • Enterprise Solutions
              Free SEO Tools
              • Domain Authority Checker
              • Link Explorer
              • Keyword Explorer
              • Competitive Research
              • Brand Authority Checker
              • Local Citation Checker
              • MozBar Extension
              • MozCast
              Resources
              • Blog
              • SEO Learning Center
              • Help Hub
              • Beginner's Guide to SEO
              • How-to Guides
              • Moz Academy
              • API Docs
              About Moz
              • About
              • Team
              • Careers
              • Contact
              Why Moz
              • Case Studies
              • Testimonials
              Get Involved
              • Become an Affiliate
              • MozCon
              • Webinars
              • Practical Marketer Series
              • MozPod
              Connect with us

              Contact the Help team

              Join our newsletter
              Moz logo
              © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
              • Accessibility
              • Terms of Use
              • Privacy

              Looks like your connection to Moz was lost, please wait while we try to reconnect.