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

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      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. Technical SEO
    4. The W3C Markup Validation Service - Good, Bad or Impartial?

    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.

    The W3C Markup Validation Service - Good, Bad or Impartial?

    Technical SEO
    4
    4
    1452
    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.
    • artdivision
      artdivision last edited by

      Hi guys,

      it seems that now days it is almost impossible to achieve 0 (Zero) Errors when testing a site via (The W3C Markup Validation Service - https://validator.w3.org). With analytic codes, pixels and all kind of tracking and social media scripts gunning it seems to be an unachievable task.

      My questions to you fellow SEO'rs out there are 2:

      1. How important and to what degree of effort do you go when you technically review a site and make the decision as to what needs to be fixed and what you shouldn't bother with.

      2. How do you argue your corner when explaining to your clients that its impossible to active 100% validation.

      *As a note i will say that i mostly refer to Wordpress driven sites.

      would love ot hear your take.

      Daniel.

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

        I am my own client, so I can be as picky as a want, and I take care of the details that I feel are important.

        I pay close attention to how the site is responding and rendering when I pretend that I am a visitor.  I pay even more attention when a customer or visitor writes to me with a complaint.   In my opinion, if the site is working great then all is good.     🙂

        W3C validation seems to be of jugular importance to W3C evangelists.  They will tell you that you will burn in Hell if you don't achieve it with flying colors.  People who want to sell you their services will point at any fault that can be detected.

        Practical people have a different opinion.  I try to be as practical as possible.

        1 Reply Last reply Reply Quote 1
        • ATP
          ATP last edited by

          I agree with Andy,

          I use it as a guidance tool on any website i build. It serves a purpose, to check things are understood how they should be by a predetermined standard. But like any other automated tool it compares to set requirements that cannot always be met and cannot identify and ok these exceptions.

          As long as you understand the error its pointing out and why its pointing it out, and know that despite this the code is rendering correctly and all outcomes are working as expected then there is no problem.

          From an SEO stand point, aslong as google see's your site how you want it too i think it is a very very minor factor. Hell all of google returns errors of some variety.

          1 Reply Last reply Reply Quote 1
          • Andy.Drinkwater
            Andy.Drinkwater last edited by

            Hi Yiannis,

            I tend to add these in as an advisory to my clients because for the most part, and unless I see something specific, the results have absolutely no effect on SEO. If they wish to act on them, it is for their developers to handle.

            I don't argue my corner really - never had to. I just tell them like it is - the site is rendering fine in everything and with no issues, so fix errors if you have the time and resources.

            As I said, unless I spot something that is an actual problem, then it tends to just get bypassed.

            -Andy

            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

            • isle_surf

              Is it bad to update product titles and URLs if they are only slightly modified

              I am doing some house cleaning on the site and made some minor updates to product titles and a rule was written in and it auto updated the URL to what the product title was with a redirect put in place from the old URL. If this a bad thing and should i leave the URL alone and just update the product title? Then for the ones i did change the Product title and the URL was updated is this a bad thing and should i have just left the URL alone? These are all high ranking popular products so dont want to mess with any rankings going into busy season?

              Technical SEO | | isle_surf
              0
            • rijwielcashencarry040

              Good robots txt for magento

              Dear Communtiy, I am trying to improve the SEO ratings for my website www.rijwielcashencarry.nl (magento). My next step will be implementing robots txt to exclude some crawling pages.
              Does anybody have a good magento robots txt for me? And what need i copy exactly? Thanks everybody! Greetings, Bob

              Technical SEO | | rijwielcashencarry040
              0
            • O2C

              Self Referencing Links - Good or Bad?

              As an agency we get quite a few of our clients come to us saying "Ooo, this company just contacted me saying they've run an SEO report on my site and we need to improve on these following things" We had one come through the other day that had reported on something we had not seen in any others before. They called them self-referencing links and marked it as a point of action should be taken. They had stated that 100% of the pages on our clients website had self-referencing links. The definition of self-referencing is when there is a link on a page that is linking to the page you are currently on. So for example you're on the home page and there is a link in the nav bar at the top that says "Home" with a link to the home page, the page you are already currently on. Is it bad practice? And if so can we do anything about it as it would seem strange from a UI point of view not to have a consistent navigation. I have not heard anything about this before but I wanted to get confirmation before going back to our client and explaining. Thanks Mozzers!

              Technical SEO | | O2C
              0
            • mathamatix

              Phone number in Meta Description - Is it a good idea?

              Is it a best practice to place your company's phone number in the meta description for a page? Are there any rules as to what is acceptable for meta tags? One of our competitors recently started doing this but for some reason I think it might be against Google's guidelines. They (competitor) is also engaging in web spam, plagiarizing our content,  and other black hat techniques so I'm leery of anything they do.

              Technical SEO | | mathamatix
              0
            • artdivision

              How can I block incoming links from a bad web site ?

              Hello all, We got a new client recently who had a warning from Google Webmasters tools for manual soft penalty. I did a lot of search and I found out one particular site that sounds roughly 100k links to one page and has been potentialy a high risk site. I wish to block those links from coming in to my site but their webmaster is nowhere to be seen and I do not want to use the disavow tool. Is there a way I can use code to our htaccess file or any other method? Would appreciate anyone's immediate response. Kind Regards

              Technical SEO | | artdivision
              0
            • MarloSchneider

              Is it worth adding schema markup to articles?

              I know things like location, pagination, breadcrumbs, video, products etc have value in using schema markup. What about things like articles though? Is it worth all the work involved in having the pages mark up automatically? How does this effect SEO, and is it worthwhile? Thanks, Spencer

              Technical SEO | | MarloSchneider
              0
            • Seiyav

              What are the potential SEO downsides of using a service like unbounce for content pages?

              I'm thinking of using unbounce.com to create some content driven pages. Unbounce is simple, easy-to-use, and very easy for non-devs at my company to create variations on pages. I know they allow adding meta descriptions, title tags, etc and allow it to be indexable by Google, but I was wondering if there were any potential downsides to using unbounce as opposed to hosting it myself. Any help would be appreciated!

              Technical SEO | | Seiyav
              0
            • inc.com

              Is it bad (black hat) to have an H1 text as a text indent?

              Is it bad practice to use a text indent through CSS for H1 text on a homepage(basically hiding h1 text)? I'm just trying to compensate for the fact that some text that should really be in the h1 tag is actually an image.

              Technical SEO | | inc.com
              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.