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?
-
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.
-
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.
-
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.
-
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
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
-
Are on-site content carousel bad for SEO?
Hi, I didn't find an answer to my question in the Forum. I attached an example of content carousel, this is what I'm talking about. I understand that Google has no problem anymore with tabbed contents and accordeons (collapsible contents). But now I'm wondering about textual carousels. I'm not talking about an image slider, I'm talking about texts. Is text carousel harder to read for Google than plain text or tabs? Of course, i'm not talking about a carousel using Flash. Let's say the code is proper... Thanks for your help. spfra5
Technical SEO | | Alviau0 -
Schema Markup for property listings (estate agent)
Hello, I've been looking online for some help with this. An estate agent has a page of properties for sale. Is it possible to mark these individual properties up and if so would they appear as rich snippets in the SERPS - never seen anything like this for properties for sale so just wondered,
Technical SEO | | AL123al1 -
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.
Technical SEO | | rijwielcashencarry040
Does anybody have a good magento robots txt for me? And what need i copy exactly? Thanks everybody! Greetings, Bob0 -
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 | | artdivision0 -
Are robots.txt wildcards still valid? If so, what is the proper syntax for setting this up?
I've got several URL's that I need to disallow in my robots.txt file. For example, I've got several documents that I don't want indexed and filters that are getting flagged as duplicate content. Rather than typing in thousands of URL's I was hoping that wildcards were still valid.
Technical SEO | | mkhGT0 -
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.com1 -
Move established site from .co.uk to .org - good or bad idea?
I am currently considering moving our site from the current .co.uk domain to the .org version which we also own. The site is established and indexed for 7 years, ranks well and has circa 10k traffic per month which is mainly UK & US traffic. The reason for the change to the .org domain is to make the site more global facing and give us the opportunity to develop the site into multi language within directories (.org/es/ etc.) and then target those to the local search engines. For the kind of site it is (community based) it wouldn’t really work to split this into lots of separate country targeted domains. So the choice is to either stick with the .co.uk and add the other foreign language specific content in directories within the .co.uk or move to the .org and do the same (there is also a potential third option of purchasing the .com which is currently unused but that could be pricey!) We are also planning a big overhaul of the site with redesign, lots of added content and reorganisation of the site – but are thinking that it would be better to move the domain on a 1:1 basis first with the current design, content and URL structure in place and then do the other changes 2 or 3 months down the line. I have read up on SEOmoz, google guidelines etc on moving a site to a new domain and understand the theoretical approach of moving the site and the steps to take (1to1 301 redirects, sitemaps on old and new etc) and I will retain ownership of the .co.uk so the redirects can remain in place indefinitely. However having worked so hard to get the site to where it is in the search engines and traffic levels I am very worried about whether the domain change is a good move. I am more than happy to accept a temporary fluctuation in rankings & traffic for 1 – 4 weeks as reported may happen as long as I can be sure it will return after a temporary period and be as strong (or almost as strong) as the previous rankings / traffic. Looking for peoples experiences to give me the confidence / reassurance to go ahead with this or any info on why I shouldn’t Thanks in advance for your advice. Adrian.
Technical SEO | | Zilla0 -
Is there such thing as a good text/code ratio? Can it effect SERPs?
As it says on the tin; Is there such thing as a good text/code ratio? And can it effect SERPs? I'm currently looking at a 20% ratio whereas some competitors are closer to 40%+. Best regards,
Technical SEO | | ARMofficial
Sam.0