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. Does the use of an underscore in filenames adversely affect SEO

    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.

    Does the use of an underscore in filenames adversely affect SEO

    Algorithm Updates
    2
    3
    1874
    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.
    • FFTCOUK
      FFTCOUK last edited by

      We have had a page which until recently was ranked first or second by Google UK and also worldwide for the term "Snowbee".  It is now no longer in the top 50.

      I ran a page optimization report on the url and had a very good score.  The only criticism was that I had used an atypical character in the url.  The only unusual character was an underscore "_"    We use the underscore in most file names without apparent problems with search engines. In fact they are automatically created in html files by our ecommerce software, and other pages do not seem to have been so adversely affected.

      Should we discontinue this practice?  It will be difficult but I'm sure we can overcome this if this is the reason why Google has marked us down.

      I attach images of the SEO Report pages

      8fDPi.jpg AdLIn.jpg

      1 Reply Last reply Reply Quote 0
      • FFTCOUK
        FFTCOUK @SL_SEM last edited by

        Thanks Charles.

        The link was useful.

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

          Underscores are not good to use in URLs as search engines do not treat it as a space or delimiter. So Snow_Bee would be considered Snowbee. I believe search engines have gotten better at figuring out when a word like this should be two words, but the best practice for this is to use hyphens (e.g. Snow-Bee).

          Here is a video from Matt Cutts about it:

          http://www.youtube.com/watch?feature=player_embedded&v=AQcSFsQyct8

          This wouldn't cause you to drop off though especially if you ranked previously. Is it just for this one term or is it for multiple terms? I would be looking at link backgrounds to be sure there weren't any spammy links getting devalued that maybe didn't get caught before, or perhaps review the content of the page to see if it might have gotten caught by the penguin anti-spamminess updates.

          FFTCOUK 1 Reply Last reply Reply Quote 3
          • 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

          • LKCservicesINC

            Multiple sub-category of the same name ? does that effect SEO

            Hello, If I have multiple sub-category of the same name ? does that affect SEO for example I have the following category structure? domain/bmw/series5/2006.html domain/bmw/series5/2007.html .. etc domain/bmw/series3/2007.html domain/bmw/series3/2006.html  ..etc domain/Acura/cl/2006.html domain/Acura/cl/2007.html .. etc I do use canonical url because I may have the same product in multiple categories but my question does google penalize me because I have the same (year) url key for multiple categories  even though I use canonical url ? do I have any advantage in masking them filters vs sub-category from SEO point of view ? specially my goal is to have different meta title and meta description for each sub category ?

            Algorithm Updates | | LKCservicesINC
            0
          • isaac663

            Using Google to find a discontinued product.

            Hi Guys. I mostly use this forum for business questions, but now it's a personal one! I'm trying to find a supplier that might still have discontinued product.  It's the Behritone C5A speaker monitor. All my searches bring up a plethora of pages that appear to sell the product... but they have no stock. (Wouldn't removing these pages make for a better internet?)  No 2nd hand ones on eBay 😞 Do you have any suggestion about how I can get more relevant results... i.e find supplier that might still have stock?  Any tips or trick I may be able to use to help me with this? Many thanks in advance to an awesome community 🙂 Isaac.

            Algorithm Updates | | isaac663
            1
          • RizwanAkbar

            Is it a good idea to 301 redirect one same niche site towards another site for seo benefit

            Hello friends, I have 2 android niche sites, one site is running on a technology dropped domain i catch 1 year ago it has, almost 400+ domains linking to different parts of the site, the other one i established from scratch and both are running from jan 2015. Now i want to redirect first site which already has 400 links pointing towards it to the home page of my 2nd android site. Is it a good idea to do so and does it give any boost in terms of seo?

            Algorithm Updates | | RizwanAkbar
            0
          • Inevo

            Ecommerce SEO: Is it bad to link to product/category pages directly from content pages?

            Hi ! In Moz' Whiteboard friday video Headline Writing and Title Tag SEO in a Clickbait World, Rand is talking about (among other things) best practices related to linking between search, clickbait and conversion pages. For a client of ours, a cosmetics and make-up retailer, we are planning to build content pages around related keywords, for example video, pictures and text about make-up and fashion in order to best target and capture search traffic related to make-up that is prevalent earlier in the costumer journey. Among other things, we plan to use these content pages to link directly to some of the products. For example a content piece about how to achieve full lashes will to link to particular mascaras and/or the mascara category) Things is, in the Whiteboard video Rand Says:
            _"..So your click-bait piece, a lot of times with click-bait pieces they're going to perform worse if you go over and try and link directly to your conversion page, because it looks like you're trying to sell people something. That's not what plays on Facebook, on Twitter, on social media in general. What plays is, "Hey, this is just entertainment, and I can just visit this piece and it's fun and funny and interesting." _ Does this mean linking directly to products pages (or category pages) from content pages is bad? Will Google think that, since we are also trying to sell something with the same piece of content, we do not deserve to rank that well on the content, and won't be considered that relevant for a search query where people are looking for make-up tips and make-up guides? Also.. is there any difference between linking from content to categories vs. products? ..I mean, a category page is not a conversion page the same way a products page is. Looking forward to your answers 🙂  

            Algorithm Updates | | Inevo
            0
          • TommyTan

            How Additional Characters and Numbers in URL affect SEO

            Hi fellow SEOmozers, I noticed that a lot of websites have additional characters and words at the end of the URL in addition keyword optimized URL.  Mostly for E-Commerce sites For example: www.yoursite.com/category/keyword?id=12345&Keyword--Category--cm_jdkfls_dklj  or wwww.yoursite.com/category/keyword#83939=-37292 My question is how does the additional characters or parameters(not necessarily tracking parameters) affect SEO? Does it matter if i have additional keywords in the additional stuff in the URL (1st url example)? If you can provide more information, that would be helpful. Thank you!

            Algorithm Updates | | TommyTan
            0
          • thealika

            Will Parked Domain hurt My SEO as Duplicate Content?

            Hello, I have one website (Migration Lawyers) and I have an extra 8 domains Parked so they are basically cloning the content of the site. so if the main site is:  migrationlawyers.co.za and I have an addon domain  migration-lawyers.com  is that good or bad? is there a proper way to redirect the sites, will redirecting (301) subdomains be more effective? Thanks for your Input 🙂 0i8VXqr.png

            Algorithm Updates | | thealika
            0
          • AshSEO2011

            "Revisit-after" Metatag = Why use it?

            Hi Mozfans, Just been thinking about the robots revisit metatag, all pages on my website (200+ pages) have the following tag on them; name="revisit-after" content="7 days" /> I'm wondering what is the purpose of the tag? Surely isn't it best to allow robots (such as Googlebot or Bingbot) to crawl your site as often as possible so the index and rankings get updated as quickly as possible? Thanks in advance everyone! Ash

            Algorithm Updates | | AshSEO2011
            0
          • sarenausa

            What are the good strategies using satellite sites in SEO??

            Hello to everybody, We'are thinking about launching a massive amount of satellite websites in order to promote our website. Is it really efficient in terms of link building? Or is the ROI really small due to the amount of time and money needed to create and manage these websites? Thanks a lot!!! Update: Thanks to all of you for all these interesting answers!

            Algorithm Updates | | sarenausa
            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
          • 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.