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.

      Let your business shine with Listings AI
      Moz Local

      Let your business shine with Listings AI

      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. How does badly formatted HTML 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.

    How does badly formatted HTML affect SEO?

    Intermediate & Advanced SEO
    4
    5
    1718
    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.
    • OptiBacUK
      OptiBacUK last edited by

      Our website uses a custom built CMS, but uses a fairly standard WYSIWYG text editor.

      I've looked at some of the code it produces, and it's not pretty. My gut feeling tells me that this extra bloat is bad for SEO.

      Am I right in thinking that Google doesn't look kindly upon badly formatted and bloated HTML?

      Thanks,
      James

      1 Reply Last reply Reply Quote 0
      • OptiBacUK
        OptiBacUK @CMC-SD last edited by

        Great, thanks for the info. I always thought Google was really hot on compliance, but good to know there is a bit of leeway.

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

          James, You might also want to look at the cached version of your page and then click on Text-only version and see if it shows up correctly. If it does, no need to worry from that perspective, but definitely worth checking from a usability, accessibility etc.

          1 Reply Last reply Reply Quote 1
          • CMC-SD
            CMC-SD last edited by

            The main concern is whether or not the spider can read the HTML. If something's broken, the spider may get confused. It's a good idea to check the site's W3C compliance and correct what you can, but I'm certain the search engines don't ding you if you're not perfectly compliant.

            The real problems with bad HTML are load times and cross-browser compatibility. (Although, frankly, great HTML can have cross-browser compatibility issues, since IE still refuses to get with the program.) Make sure the site looks good in all major browsers.

            OptiBacUK 1 Reply Last reply Reply Quote 2
            • Matt-Williamson
              Matt-Williamson last edited by

              As long as the code produced is readable in a web browser then it being bloated shouldn't have much of an impact in terms of SEO. The code bloats only downside is that it might slow the page load which will have impact on SEO. Remember crawlers like Google bot essentially look at the page content in terms of textual content, what labels (alt tags etc), images and links are on there not how neatly it is presented or whether it is valid markup or not. I would take a look at your page speed otherwise I would worry as long as it is able to fulfil all the basic on page requirements such as headers, page titles etc.

              Just to reiterate this - I have worked with CMS driven sites that aren't W3C compliant and don't produce the nicest html, but have loaded fast and ranked in the top 3 for competitive terms.

              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

              • si.analytics

                Is using a subheading to introduce a section before the main heading bad for SEO?

                I have noticed a popular trend in web design which involves sections of content being started with what looks to be smaller sub heading something like <h3>, <h4> or <h5> and then followed by a bigger heading <h2>. My question is, what is the best way to deal with this visual structure and will having a structure like this hurt your SEO? <h5>Contact Us</h5> <h2>Get started with your next project in minutes!<h2> <p>Some text here ...</p> Here are some examples where the header structure is similar to above (smaller before bigger): https://www.snappr.com/ https://form.taxi/ https://fluz.app/ If that structure is bad for SEO, then it seems like a simple solution is to make it purely visual, mimicking a sub header with styling on a span or paragraph like these sites do: https://www.andrejilderda.nl/ https://nightwatch.io/ https://www.swingvy.com/ https://www.figma.com/ My only concern with that approach is because your section sub heading is no longer an actual header you will miss out on ranking important and relevant keyword information for that section. Is this correct something to be worried about? There is one last solution I stumbled upon that involves using headings for both but in reverse hierarchy so a <h3> is first but styled to be smaller, followed by a visually bigger <h4> which provides the addition context. https://avocode.com/ Anyone have thoughts, expertise or resources on the matter?

                Intermediate & Advanced SEO | | si.analytics
                0
              • gamstopbet

                Will critical error in wordpress for memory limit affect seo rankings?

                will critical error in wordpress to increase memory limit affect seo rankings?

                Intermediate & Advanced SEO | | gamstopbet
                0
              • Nobody1616542228134

                Why is pagination SEO such a mystery in 2021?

                Hi folks. I would like to discuss pagination. I use WordPress (Genesis, specifically). I ran my site through a site scan and it flagged an error which told me that my blog was producing duplicate meta descriptions because the  blog is paginated - the same meta description from the blog page is being used on Page 2, Page 3 etc. I looked into this and the Internet is awash with many other people scratching around for a solution. My understanding is that using a canonical link on the first page is not a good idea, because it says to Google that only Page 1 of the blog is important. I also read an article that states Google no longer reads the Rel=Prev/Next code that could be used to tell Google to ignore the issue. So, what's the solution? Do I even need one? As a side-thought, it seems to me that pagination is, well, pretty useless. I mean, if my blog has 20 pages and I've worked hard to create content, who is going to click through to anywhere near page 20? Nobody. There has to be a smarter way for people on-site to access content. I would love your thoughts on all of this. Cheers.

                Intermediate & Advanced SEO | | Nobody1616542228134
                0
              • angelamaemae

                Kind of duplicate categories and custom taxonomy. Necessary, but bad for SEO?

                Hello Everyone! I'm new here! My husband and I are working on creating a website: https://sacwellness.com .The site is an online therapist directory for the the Sacramento California area. Our problem is this: In wordpress our category system is being used for blog posts. Our theme is using a custom taxonomy system to categorize different therapist specialties, therapeutic approaches, etc. We've found ourselves in a position where our custom taxonomy and categories are near duplicates. for example we have the blog categories: ADHD counseling, Anxiety therapy, and Career counseling our corresponding custom taxonomy/therapist categories are: ADHD, Anxiety, and....(oops) career counseling. My understanding is that google doesn't see a difference between identically named categories and custom taxonomies and will so choose one to rank and disregard the other, effectively leaving you competing against yourself. is this true in a case like this? Can google maybe understand the difference because of the custom taxonomy and/or URL paths? if this is a problem is it ok to have near duplicates....like ADHD vs. ADHD counseling. This has been our solution so far....but now we're questioning it....derp x_x. I thought about tagging the categories with no index, but I think the archive pages would be useful for people. Essentially we have 2 sets of archives for each keyword. One is for blog posts, and one is for therapists who work with that particular issue along with the 6 most recent blog posts in that category.....because we are putting the 6 most recent blog posts at the bottom of the therapist pages I feel like it wouldn't be as terrible of a loss if we had to noindex the category pages. ....what do you think? Thank you!

                Intermediate & Advanced SEO | | angelamaemae
                0
              • Cin7_Marketing

                Does changing template for a wordpress site affect SEO

                Hi I work for an Inventory Management Software company and we already have a WordPress site but I am currently working on re-designing of our WordPress site and in this process, we are looking for moving to a new template. I want to know what will be the impact on SEO performance while taking a shift to a new template.

                Intermediate & Advanced SEO | | Cin7_Marketing
                0
              • Bankable

                How will changing my website's page content affect SEO?

                Our company is looking to update the content on our existing web pages and I am curious what the best way to roll out these changes are in order to maintain good SEO rankings for certain pages. The infrastructure of the site will not be modified except for maybe adding a couple new pages, but existing domains will stay the same. If the domains are staying the same does it really matter if I just updated 1 page every week or so, versus updating them all at once? Just looking for some insight into how freshening up the content on the back end pages could potentially hurt SEO rankings initially. Thanks!

                Intermediate & Advanced SEO | | Bankable
                1
              • Eric_Lifescript

                Bad SEO Practice: in title tag?

                Greetings, I just discovered that some of our content was produced with
                tags in the title tag. Example: <title>Diabetes Symptoms <br> In Women Over 40</title> My gut says this is bad for SEO, but I couldn't find a definitive answer on the web, so I thought I would ask the community of gurus here at Moz. 🙂 Thanks in advance for any reply. Kind regards, Eric

                Intermediate & Advanced SEO | | Eric_Lifescript
                0
              • Thos003

                Server Migration, Does it effect SEO?

                About to go through a server migration. My intitial thought is that a change in servers shouldn't really change my rankings. But I've heard rumors... Can a server migration change rankings? Why?

                Intermediate & Advanced SEO | | Thos003
                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.