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.

      Track AI Overviews in Keyword Research
      Moz Pro

      Track AI Overviews in Keyword Research

      Try it free!
    • 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. Research & Trends
    3. Algorithm Updates
    4. Sub-domain with spammy content and links: Any impact on main website rankings?

    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.

    Sub-domain with spammy content and links: Any impact on main website rankings?

    Algorithm Updates
    3
    2
    690
    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.
    • vtmoz
      vtmoz last edited by

      Hi all,

      One of our sub-domains is forums. Our users will be discussing about our product and many related things. But some of the users in forum are adding a lot of spammy content everyday. I just wonder whether this scenario is ruining our ranking efforts of main website? A sub domain with spammy content really kills the ranking of main website?

      Thanks

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

        Hi vtmoz,

        I see you have posted an updated question on this issue separately - regarding the spammy inbound links pointing to this subdomain. That is a more likely problem for your site.

        That said, the more spam that shows up on that subdomain, the more likely Google is to seeing your site as part of a "bad neighborhood" of the web, and this could risk the organic visibility of your root domain.

        There is no documentation on "how much spammy content is too much" - generally, some spammy content on a subdomain doesn't negatively impact the entire domain. However I have seen cases where an entire domain was negatively impacted by a very large number of spammy pages on various subdomains. It's a matter of scale.

        If your rankings and traffic on your primary domain are important, my advice would be to mitigate the risk by either policing the content on your forum subdomains by bringing in admins, or shutting down the forums entirely.

        Best,
        Mike

        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

        • vtmoz

          Huge difference between GSC ranking and browser ranking for certain keywords: How to proceed?

          Hi, There is a huge ranking difference between the GSC and browser  for our primary keyword. As per GSC, our ranking is around 15 and when checking on the multiple different incognito browsers it's around 50. How to handle this? Which is the accurate one? Product expert from Google forums claim that what I see on browsers are the personalized results; but I tried on different browsers with different connections. Thanks

          Algorithm Updates | | vtmoz
          0
        • fabx

          About porn sites and ranking

          Hello, I'm thinking to extend my website into porn. At the moment there is no pornography on it, although we do talk about sex related topics and products (from dating to tutorials, to toys etc.) Would it be dangerous to keep the porn section on the same domain as the rest? Would this negatively affect my non-porn content as Googlebot would "flag" my website as being pornographic (although only a few pages would be)? Or simply Googlebot would leave the current non-porn pages ranking as they are now, just fine, and plus it would rank the porn pages if they "deserve" to? I hope my question is clear. I don't want to create a subdomain.

          Algorithm Updates | | fabx
          0
        • BFMichael

          Does an EAT score on my YMYL site impact my rankings?

          I've read some conflicting information on YMYL and EAT.  If the Google Quality Raters are out there reviewing YMYL pages and scoring them on EAT, does that site's score have an impact on that page's/site's ranking?

          Algorithm Updates | | BFMichael
          0
        • rwat

          Can 'Jump link'/'Anchor tag' urls rank in Google for keywords?

          E.g. www.website.com/page/#keyword-anchor-text Where the part after the # is a section of the page you can jump to, and the title of that section is a secondary keyword you want the page to rank for?

          Algorithm Updates | | rwat
          0
        • vtmoz

          Ranking drop after sub domain to sub directory migration. Usual?

          Hi all, We had our help articles on sub-domain help.website.com. Then we moved it to sub directory website.com/help/. We expected ranking improvement of website.com as there is a wide saying of benefiting from sub domain to sub directory migration. We have noticed that ranking improvement of new sub directory pages (website.com/help/) but not for any main website pages (website.com). I presume that link juice from main website has benefited new sub directory pages but main website lost ranking due to the page rank dilution. Do you agree? Any ideas? Thanks

          Algorithm Updates | | vtmoz
          0
        • MozzieJr

          Is user engagement a ranking signal?

          Read something about user engagement might be a signal that Google uses, along with links and on-site optimisation, to decide if a search result goes up or down. What should I believe and what are the developments in this field?

          Algorithm Updates | | MozzieJr
          0
        • Eyah

          Exact Keywords Domain name

          Hello everyone!, I would love to have your opinion on this matter. I am working on a company e-commerce site; these guys would like to change their domain name AND their company name, so the most logical thing that came to mind was to name the domain after the company name. However, they also bought in the past a domain that have the exact keyword they would like to rank for. I know that keywords in the URL are not as important as they used to be in the past, but nonetheless when I do a Google search for those keywords, 3 domains out of 10 on the first page are slight variations of those same keywords, meaning that they might have a really good domain name (also the other result are government, medical stuff and so on). And, no matter how many times I have read that keywords in the URL are not so important anymore, I still see a lot of sites ranking also because of their domain name (well at least outside the US) So, my question here is: would it be better for them to use the exact match keyword-domain name or should they use their company name for their new site? Or some sort combination of the two? (the keyword-domain that in some way points also to the brand domain). Thanks for your opinions on this; really appreciate it! Cheers

          Algorithm Updates | | Eyah
          0
        • ydop

          Plural vs non-plural domain name

          I'm sure this question has been answered and asked a 1,000 different ways but what would be the best domain name to use in the long term (2 years +)? The plural versions (examples.com) which has a decent domain authority and is ranking 1st in Google search results yet has less search volume or the singular version (example.com) that has no current SEO value for the search term that we'd like to target however the singular version of the keyword has a much higher search volume? so basically will it be better to have the exact match that has more volume or the plural form that has better rankings after 2 years of doing SEO for each domain? My guess is that using (examples.com) with the better domain authority and tightening the grip on its dominance in Google will still be more effective than having the exact match domain with more search volume for that keyword while performing the same amount of SEO even after two years. Any suggestions?

          Algorithm Updates | | ydop
          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
        • Digital Marketers
        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.