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
      • MozCon
      • 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. On-Page Optimization
    4. Percentage of duplicate content allowable

    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.

    Percentage of duplicate content allowable

    On-Page Optimization
    6
    8
    10476
    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.
    • sportstvjobs
      sportstvjobs last edited by

      Can you have ANY duplicate content on a page or will the page get penalized by Google?

      For example if you used a paragraph of Wikipedia content for a definition/description of a medical term, but wrapped it in unique content is that OK or will that land you in the Google / Panda doghouse?

      If some level of duplicate content is allowable, is there a general rule of thumb ratio unique-to-duplicate content?

      thanks!

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

        I dont believe you have aproblem if you havea bit of duplicate content, google does not penilize you for duplicate content, it just dosent award you points for it.

        1 Reply Last reply Reply Quote 0
        • Dan-Petrovic
          Dan-Petrovic @seoninja20 last edited by

          That sounds like something Google will hate by default. Your problem there is page quantity to quality and uniqueness ratio.

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

            It's quite difficult to provide the exact data as Google algorithm is Google's hidden treasure. Better to keep yourself safe by creating completely unique content, Referring to your example of Wikipedia definition, you can add something like " ACCORDING TO WIKIPEDIA ..... " while copying definition or adding reference links while copying any content from other sources.

            Remember that Google is  not only giving importance to unique content but it should be of high quality. That means the article should be innovative like a complete new thing & well researched, so it mustn't be of 200 or less words. So Google will compare the quality of the whole article with the copied content & then it'll decide whether it's a duplicate content article or not.

            1 Reply Last reply Reply Quote 0
            • RyanKent
              RyanKent @seoninja20 last edited by

              We recently launched a large 3500 page website that auto generates a sentence after we plug in statistical data in our database.

              So the only unique content is a single sentence?

              Within that sentence many of the words would need to be common as well. Consider a simple site that offered the population for any given location. "The population of [California] is [13 million] people."

              In the above example only 3 words are unique. Maybe your pages are a bit more elaborate but it seems to me those pages are simply not indexable. What you can do is index the main page where users can enter the location they wish to learn about, but not each possible result (i.e. California).

              Either add significantly more content, or only index the main page.

              1 Reply Last reply Reply Quote 0
              • seoninja20
                seoninja20 @Dan-Petrovic last edited by

                We recently launched a large 3500 page website that auto generates a sentence after we plug in statistical data in our database. All pages are relevant to users and provide more value than other results in serps, but i think a penalty is in place that the farmer update may have detected with a sort of auto-penalty against us.

                I sent in a reconsideration request last week, the whole project is on hold until we get a response. I'm expecting a generic answer from them.

                We are debating on either writing more unique content for every page or entering in more statistical data to run some cool correlations. The statistical data would be 3x more beneficial to the user I feel, but unique content is what Google seeks and a safer bet just to get us indexed properly.

                RyanKent Dan-Petrovic 2 Replies Last reply Reply Quote 0
                • Dan-Petrovic
                  Dan-Petrovic last edited by

                  We're currently observing a crumbling empire of websites with auto-generated content. Google is somehow able to understand how substantial your content is and devalue the page and even the whole site if it does not meet their criteria. This is especially damaging for sites who have say 10% of great unique content and 90% of their pages are generated via tagging, browsable search and variable driven paragraphs of text.

                  Having citations is perfectly normal but I would include reference section just in case.

                  seoninja20 1 Reply Last reply Reply Quote 0
                  • RyanKent
                    RyanKent last edited by

                    You can have some duplicate content in the manner you mentioned above. It is a natural and expected part of the internet that existing sources of information will be utilized.

                    There is not any magic number which says "30% duplication is ok, but 31% is not". Google's algorithms are private and constantly changing. Use good sense to guide you as to whether your page is unique and offers value to users.

                    1 Reply Last reply Reply Quote 1
                    • 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

                    • wearehappymedia

                      Duplicate content with tagging and categories

                      Hello, Moz is showing that a site has duplicate content - which appears to be because of tags and categories. It is a relatively new site, with only a few blog publications so far. This means that the same articles are displayed under a number of different tags and categories... Is this something I should worry about, or just wait until I have more content? The 'tag' and 'category' pages are not really pages I would expect or aim for anyone to find in google results anyway. Would be glad to here any advice / opinions on this Thanks!

                      On-Page Optimization | | wearehappymedia
                      1
                    • Dan-Lawrence

                      Duplicate Content Re: Product listing body copy on Website, Amazon & Ebay - issues ?

                      Hi Is it ok to have identical product body copy on market/platform listings same as the websites product listings ? In this case the products are the websites/own brand products (all pages canonicalised), so i take it shouldn't cause any issues or are you supposed to differentiate the product body copy on marketplace listings ? Im asking re seo reasons All Best Dan

                      On-Page Optimization | | Dan-Lawrence
                      0
                    • SpaMedica

                      Duplicate Content with ?Page ID's in WordPress

                      Hi there, I'm trying to figure out the best way to solve a duplicate content problem that I have due to Page ID's that WordPress automatically assigns to pages. I know that in order for me to resolve this I have to use canonical urls but the problem for me is I can't figure out the URL structure. Moz is showing me thousands of duplicate content errors that are mostly related to Page IDs For example, this is how a page's url should look like on my site Moz is telling me there are 50 duplicate content errors for this page. The page ID for this page is 82 so the duplicate content errors appear as follows and so on. For 47 more pages. The problem repeats itself with other pages as well. My permalinks are set to "Post Name" so I know that's not an issue. What can I do to resolve this? How can I use canonical URLs to solve this problem. Any help will be greatly appreciated.

                      On-Page Optimization | | SpaMedica
                      0
                    • ShearingsGroup

                      Duplicate content on partner site

                      I have a trade partner who will be using some of our content on their site. What's the best way to prevent any duplicate content issues? Their plan is to attribute the content to us using rel=author tagging. Would this be sufficient or should I request that they do something else too? Thanks

                      On-Page Optimization | | ShearingsGroup
                      0
                    • inlinear

                      Duplicate Content when Using "visibility classes" in responsive design layouts? - a SEO-Problem?

                      I have text in the right column of my responsive layout which will show up below the the principal content on small devices. To do this I use visibility classes for DIVs. So I have a DIV with with a unique style text that is visible only on large screen sizes. I copied the same text into another div which shows only up only on small devices while the other div will be hidden in this moment. Technically I have the same text twice on my page. So this might be duplicate content detected as SPAM? I'm concerned because hidden text on page via expand-collapsable textblocks will be read by bots and in my case they will detect it twice?Does anybody have experiences on this issue?bestHolger

                      On-Page Optimization | | inlinear
                      0
                    • MarkCA

                      Does schema.org assist with duplicate content concerns

                      The issue of duplicate content has been well documented and there are lots of articles suggesting to noindex archive pages in WordPress powered sites. Schema.org allows us to mark-up our content, including marking a components URL. So my question simply, is no-indexing archive (category/tag) pages still relevant when considering duplicate content? These pages are in essence a list of articles, which can be marked as an article or blog posting, with the url of the main article and all the other cool stuff the scheme gives us. Surely Google et al are smart enough to recognise these article listings as gateways to the main content, therefore removing duplicate content concerns. Of course, whether or not doing this is a good idea will be subjective and based on individual circumstances - I'm just interested in whether or not the search engines can handle this appropriately.

                      On-Page Optimization | | MarkCA
                      0
                    • esiow2013

                      Plagiarism or duplicate checker tool?

                      Do you know a plagiarism or duplicate checker tool where I can receive an email alert if someone copies my content? I know there's a tool like this (similar to http://www.tynt.com/ though people can still remove the link from the original source) but I forgot the name or site. It's like a source code that you must insert in each of your webpage. Thanks in advanced!

                      On-Page Optimization | | esiow2013
                      1
                    • smaavie

                      Avoiding "Duplicate Page Title" and "Duplicate Page Content" - Best Practices?

                      We have a website with a searchable database of recipes. You can search the database using an online form with dropdown options for: Course (starter, main, salad, etc)
                      Cooking Method (fry, bake, boil, steam, etc)
                      Preparation Time (Under 30 min, 30min to 1 hour, Over 1 hour) Here are some examples of how URLs may look when searching for a recipe: find-a-recipe.php?course=starter
                      find-a-recipe.php?course=main&preperation-time=30min+to+1+hour
                      find-a-recipe.php?cooking-method=fry&preperation-time=over+1+hour There is also pagination of search results, so the URL could also have the variable "start", e.g. find-a-recipe.php?course=salad&start=30 There can be any combination of these variables, meaning there are hundreds of possible search results URL variations. This all works well on the site, however it gives multiple "Duplicate Page Title" and "Duplicate Page Content" errors when crawled by SEOmoz. I've seached online and found several possible solutions for this, such as: Setting canonical tag Adding these URL variables to Google Webmasters to tell Google to ignore them Change the Title tag in the head dynamically based on what URL variables are present However I am not sure which of these would be best. As far as I can tell the canonical tag should be used when you have the same page available at two seperate URLs, but this isn't the case here as the search results are always different. Adding these URL variables to Google webmasters won't fix the problem in other search engines, and will presumably continue to get these errors in our SEOmoz crawl reports. Changing the title tag each time can lead to very long title tags, and it doesn't address the problem of duplicate page content. I had hoped there would be a standard solution for problems like this, as I imagine others will have come across this before, but I cannot find the ideal solution. Any help would be much appreciated. Kind Regards

                      On-Page Optimization | | smaavie
                      5

                    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.