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?
-
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 -
Great, thanks for the info. I always thought Google was really hot on compliance, but good to know there is a bit of leeway.
-
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.
-
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.
-
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.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
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.
Related Questions
-
Default Wordpress 301 Redirects of JS and CSS files. Bad for SEO & How to Fix?
Hi there: We are developers with some digital marketing expertise, but a current issue has us perplexed. An outside SEO firm has asked us to clean up a large number of 301 redirects. Most of these are 'default' Wordpress behavior that relate to calling the latest version of a JS or CSS file. For instance, a JS file is called with this: https://websitexyz.com/wp-includes/js/wp-embed.min.js?ver=4.9.1 but ultimately redirects to this: https://websitexyz.com/wp-includes/js/wp-embed.min.js. We are being asked to prevent the redirect from happening by, presumably, calling the ultimate file to begin with. The issue is that, as far as we know, there's no easy way to alter WP behavior to call the ultimate file to begin with. Does anyone have any thoughts on this? Thanks.
Intermediate & Advanced SEO | Jan 5, 2018, 1:33 PM | Daaveey0 -
Bad SEO Practice: in title tag?
Greetings, I just discovered that some of our content was produced with
Intermediate & Advanced SEO | Mar 22, 2016, 11:23 PM | Eric_Lifescript
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, Eric0 -
SEO Advice for Angular JS
We are changing our homepage (and gradually the rest of the site) to Angular JS.
Intermediate & Advanced SEO | Nov 30, 2014, 4:31 AM | theLotter
In order not to lose anything in terms of SEO we are implementing Hashbangs + escaped fragment snapshots. Are there any other SEO considerations you think we should have and/or additional elements that we could add to the page to improve it in terms of SEO?0 -
How does having multiple pages on similar topics affect SEO?
Hey everyone, On our site we have multiple pages that have similar content. As an example, we have a section on Cars (in general) and then specific pages for Used Cars, European Cars, Remodeled Cars etc. Much of the content is similar on these page and the only difference is some content and the additional term in the URL (for example car.com/remodeled-cars and /european-cars). In the past few months, we've noticed a dip in our organic ranking and started doing research. Also, we noticed that Google, in SERPs, shows the general page (cars.com/cars) and not the specific page (/european-cars), even if the specific page has more content. Can having multiple pages with similar content hurt SEO? If so, what is the best way to remedy this? We can consolidate some of the pages and make the difference between them a little clearer, but does it make that much of a difference for rankings? Thanks in advance!
Intermediate & Advanced SEO | Jul 25, 2014, 8:28 AM | JonathonOhayon0 -
SEO site Review
Does anyone have suggestions on places that provide in depth site / analytics reviews for SEO?
Intermediate & Advanced SEO | Apr 21, 2014, 1:49 PM | Gordian0 -
Is CloudFlare bad for SEO?
I have been hit by DDoS attacks lately...not on a huge scale, but probably done by some "script kiddies" or competitors of mine. Still, I need to take some action in order to protect my server and my site against all of this spam traffic that is being sent to it. In the process of researching the tools available for defending a website from a DDoS attack, I came across the service offered by CloudFlare.com. According to the CloudFlare website, they protect your site against a DDoS attack by showing users/visitors they find suspicious an interstitial that asks them if they are a real user or a bot...this interstitial contains a Captcha that suspicious users are asked to enter in order to visit the site. I'm just wondering what kind of an effect such an interstitial could have on my Google rankings...I can imagine that such a thing could add to increased click-backs to the SERPs and, if Google detects this, to lower rankings. Has anyone had experience with the DDoS protection services offered by CloudFlare, who can say a word or two regarding any effects this may have on SEO? Thanks
Intermediate & Advanced SEO | Apr 8, 2024, 11:49 AM | masterfish1 -
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 | Sep 10, 2012, 8:10 PM | Thos0030 -
Migrating online store to subdomain using shopify and effects on seo and energy down the road for seo
I'm looking for some clarity... Looking at using Shopify for an existing online store that we have to migrate. Setting up the store with shopify means we will be using a subdomain such as shop.mywebsite.com instead of mywebsite.com/shop. The following are points to consider when responding The client currently has an online store, however it's a proprietary shopping store and CMS that has since gone defunct and they need to migrate to an alternative in order to survive online against new CMS systems that allow the site and its content to be better optimized. There is a lot of existing SEO done on the current site that we don't want to loose PR on. There is roughly 2000 products Client has a fixed budget, dealing with checkout issues, custom work and various other "bugs" seems to be easier controlled with Shopify...thus budget can be used more on content/strategy and migration We want to run the main site in Wordpress and are wanting to use Shopify since it supports a gateway, has great features and seems like it would allow us to get more bang for the buck and can focus more on the main site and content strategy and drive traffic to the subdomain store if needed Or main concern is the effort of migrating 2000+ products to shopify and the traffic and PR it gives the current site will have a negative effect on the main domain itself. Should we really be considering this path? The domain is diveidc.com One main benefit to the subdomain is the ability to clearly segment products from the service portion of the site in the analytics and focus 2 clear strategies and track it in a very defined manner. We're really on the fence with this...any thoughts are welcome.
Intermediate & Advanced SEO | Sep 25, 2011, 3:33 PM | MAGNUMCreative0