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
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • 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
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • 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.

      • 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. Could you use a robots.txt file to disalow a duplicate content page from being crawled?

    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.

    Could you use a robots.txt file to disalow a duplicate content page from being crawled?

    Intermediate & Advanced SEO
    5
    11
    2875
    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.
    • gregelwell
      gregelwell last edited by

      A website has duplicate content pages to make it easier for users to find the information from a couple spots in the site navigation. Site owner would like to keep it this way without hurting SEO.

      I've thought of using the robots.txt file to disallow search engines from crawling one of the pages. Would you think this is a workable/acceptable solution?

      1 Reply Last reply Reply Quote 0
      • KyleChamp
        KyleChamp @gregelwell last edited by

        Yeah, sorry for the confusion. I put the tag on all the pages (Original and Duplicate). I sent you a PM with another good article on Rel canonical tag

        1 Reply Last reply Reply Quote 0
        • gregelwell
          gregelwell @Dr-Pete last edited by

          Peter, Thanks for the clarification.

          1 Reply Last reply Reply Quote 0
          • Dr-Pete
            Dr-Pete Staff @anthonytjm last edited by

            Generally agree, although I'd just add that Robots.txt also isn't so great at removing content that's already been indexed (it's better at prevention). So, I find that it's not just not ideal - it sometimes doesn't even work in these cases.

            Rel-canonical is generally a good bet, and it should go on the duplicate (you can actually put it on both, although it's not necessary).

            gregelwell 1 Reply Last reply Reply Quote 1
            • gregelwell
              gregelwell @gregelwell last edited by

              Next time I'll read the reference links better 🙂

              Thank you!

              1 Reply Last reply Reply Quote 0
              • anthonytjm
                anthonytjm @gregelwell last edited by

                per google webmaster tools:

                If Google knows that these pages have the same content, we may index only one version for our search results. Our algorithms select the page we think best answers the user's query. Now, however, users can specify a canonical page to search engines by adding a element with the attribute rel="canonical" to the section of the non-canonical version of the page. Adding this link and attribute lets site owners identify sets of identical content and suggest to Google: "Of all these pages with identical content, this page is the most useful. Please prioritize it in search results."

                1 Reply Last reply Reply Quote 0
                • gregelwell
                  gregelwell @KyleChamp last edited by

                  Thanks Kyle. Anthony had a similar view on using the rel canonical tag. I'm just curious about adding it to both the original page or duplicate page? Or both?

                  Thanks,

                  Greg

                  KyleChamp 1 Reply Last reply Reply Quote 0
                  • gregelwell
                    gregelwell @anthonytjm last edited by

                    Anthony, Thanks for your response. See Kyle, he also felt using the rel canonical tag was the best thing to do. However he seemed to think you'd put it on the original page - the one you want to rank for. And you're suggesting putting on the duplicate page. Should it be added to both while specifying which page is the 'original'?

                    Thanks!

                    Greg

                    anthonytjm gregelwell 2 Replies Last reply Reply Quote 0
                    • Adam.Whittles
                      Adam.Whittles last edited by

                      I'm not sure I understand why the site owner seems to think that the duplicate content is necessary?

                      If I was in your situation I would be trying to convince the client to remove the duplicate content from their site, rather than trying to find a way around it.

                      If the information is difficult to find then this may be due to a problem with the site architecture. If the site does not flow well enough for visitors to find the information they need, then perhaps a site redesign is necessary.

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

                        Well, the answer would be yes and no. A robots.txt file would stop the bots from indexing the page, but links from other pages in site to that non indexed page could therefor make it crawlable and then indexed. AS posted in google webmaster tools here:

                        "You need a robots.txt file only if your site includes content that you don't want search engines to index. If you want search engines to index everything in your site, you don't need a robots.txt file (not even an empty one).

                        While Google won't crawl or index the content of pages blocked by robots.txt, we may still index the URLs if we find them on other pages on the web. As a result, the URL of the page and, potentially, other publicly available information such as anchor text in links to the site, or the title from the Open Directory Project (www.dmoz.org), can appear in Google search results."

                        I think the best way to avoid any conflict is applying the rel="canonical"  tag to each duplicate page that you don't want indexed.

                        You can find more info on rel canonical here

                        Hope this helps out some.

                        gregelwell Dr-Pete 2 Replies Last reply Reply Quote 2
                        • KyleChamp
                          KyleChamp last edited by

                          The best way would be to use the Rel canonical tag

                          On the page you would like to rank for put the Rel canonical tag in

                          This lets google know that this is the original page.

                          Check out this link posted by Rand about the Rel canonical tag [http://www.seomoz.org/blog/canonical-url-tag-the-most-important-advancement-in-seo-practices-since-sitemaps](http://www.seomoz.org/blog/canonical-url-tag-the-most-important-advancement-in-seo-practices-since-sitemaps)

                          gregelwell 1 Reply Last reply Reply Quote 2
                          • 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

                          • AspenFasteners

                            What happens to crawled URLs subsequently blocked by robots.txt?

                            We have a very large store with 278,146 individual product pages. Since these are all various sizes and packaging quantities of less than 200 product categories my feeling is that Google would be better off making sure our category pages are indexed. I would like to block all product pages via robots.txt until we are sure all category pages are indexed, then unblock them. Our product pages rarely change, no ratings or product reviews so there is little reason for a search engine to revisit a product page. The sales team is afraid blocking a previously indexed product page will result in in it being removed from the Google index and would prefer to submit the categories by hand, 10 per day via requested crawling. Which is the better practice?

                            Intermediate & Advanced SEO | | AspenFasteners
                            1
                          • yacpro13

                            Duplicate content on URL trailing slash

                            Hello, Some time ago, we accidentally made changes to our site which modified the way urls in links are generated. At once, trailing slashes were added to many urls (only in links). Links that used to send to
                            example.com/webpage.html Were now linking to
                            example.com/webpage.html/ Urls in the xml sitemap remained unchanged (no trailing slash). We started noticing duplicate content (because our site renders the same page with or without the trailing shash). We corrected the problematic php url function so that now, all links on the site link to a url without trailing slash. However, Google had time to index these pages. Is implementing 301 redirects required in this case?

                            Intermediate & Advanced SEO | | yacpro13
                            1
                          • Modi

                            After Server Migration - Crawling Gets slow and Dynamic Pages wherein Content changes are not getting Updated

                            Hello, I have just performed doing server migration 2 days back All's well with traffic moved to new servers But somehow - it seems that w.r.t previous host that on submitting a new article - it was getting indexed in minutes. Now even after submitting page for indexing - its taking bit of time in coming to Search Engines and some pages wherein content is daily updated - despite submitting for indexing - changes are not getting reflected Site name is - http://www.mycarhelpline.com Have checked in robots, meta tags, url structure - all remains well intact. No unknown errors reports through Google webmaster Could someone advise - is it normal - due to name server and ip address change and expect to correct it automatically or am i missing something Kindly advise in . Thanks

                            Intermediate & Advanced SEO | | Modi
                            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
                          • WebbyNabler

                            Duplicate Content From Indexing of non- File Extension Page

                            Google somehow has indexed a page of mine without the .html extension.  so they indexed  www.samplepage.com/page, so I am showing duplicate content because Google also see's  www.samplepage.com/page.html   How can I force google or bing or whoever to only index and see the page including the .html extension?  I know people are saying not to use the file extension on pages, but I want to, so please anybody...HELP!!!

                            Intermediate & Advanced SEO | | WebbyNabler
                            0
                          • joseph.chambers

                            Duplicate Content | eBay

                            My client is generating templates for his eBay template based on content he has on his eCommerce platform. I'm 100% sure this will cause duplicate content issues. My question is this.. and I'm not sure where eBay policy stands with this but adding the canonical tag to the template.. will this work if it's coming from a different page i.e. eBay? Update: I'm not finding any information regarding this on the eBay policy's: http://ocs.ebay.com/ws/eBayISAPI.dll?CustomerSupport&action=0&searchstring=canonical So it does look like I can have rel="canonical" tag in custom eBay templates but I'm concern this can be considered: "cheating" since rel="canonical is actually a 301 but as this says: http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html it's legitimately duplicate content. The question is now: should I add it or not? UPDATE seems eBay templates are embedded in a iframe but the snap shot on google actually shows the template. This makes me wonder how they are handling iframes now. looking at http://www.webmaster-toolkit.com/search-engine-simulator.shtml does shows the content inside the iframe. Interesting. Anyone else have feedback?

                            Intermediate & Advanced SEO | | joseph.chambers
                            1
                          • donthe

                            Paging. is it better to use noindex, follow

                            Is it better to use the robots meta noindex, follow tag for paging, (page 2, page 3) of Category Pages which lists items within each category or just let Google index these pages Before Panda I was not using noindex because I figured if page 2 is in Google's index then the items on page 2 are more likely to be in Google's index. Also then each item has an internal link So after I got hit by panda, I'm thinking well page 2 has no unique content only a list of links with a short excerpt from each item which can be found on each items page so it's not unique content, maybe that contributed to Panda penalty. So I place the meta tag noindex, follow on every page 2,3 for each category page. Page 1 of each category page has a short introduction so i hope that it is enough to make it "thick" content (is that a word :-))  My visitors don't want long introductions, it hurts bounce rate and time on site. Now I'm wondering if that is common practice and if items on page 2 are less likely to be indexed since they have no internal links from an indexed page Thanks!

                            Intermediate & Advanced SEO | | donthe
                            0
                          • AndrewY

                            Blocking Dynamic URLs with Robots.txt

                            Background: My e-commerce site uses a lot of layered navigation and sorting links.  While this is great for users, it ends up in a lot of URL variations of the same page being crawled by Google.  For example, a standard category page: www.mysite.com/widgets.html ...which uses a "Price" layered navigation sidebar to filter products based on price also produces the following URLs which link to the same page: http://www.mysite.com/widgets.html?price=1%2C250 http://www.mysite.com/widgets.html?price=2%2C250 http://www.mysite.com/widgets.html?price=3%2C250 As there are literally thousands of these URL variations being indexed, so I'd like to use Robots.txt to disallow these variations. Question: Is this a wise thing to do?  Or does Google take into account layered navigation links by default, and I don't need to worry. To implement, I was going to do the following in Robots.txt: User-agent: * Disallow: /*? Disallow: /*= ....which would prevent any dynamic URL with a '?" or '=' from being indexed.  Is there a better way to do this, or is this a good solution? Thank you!

                            Intermediate & Advanced SEO | | AndrewY
                            1

                          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.