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
-
Query string parameters always bad for SEO?
I've recently put some query string parameters into links leading to a 'request a quote' form which auto-fill the 'product' field with the name of the product that is on the referring product page. E.g. Red Bicycle product page >>> Link to RFQ form contains '?productname=Red-Bicycle' >>>> form's product field's default value becomes 'Red-Bicycle' I know url parameters can lead to keyword cannibalisation and duplicate content, we use sub-domains for our language changer. BUT for something like this, am I potentially damaging our SEO? Appreciate I've not explained this very well. We're using Kentico by the way, so K# macros are a possibility (I use a simple one to fill the form's Default Field).
Technical SEO | | landport0 -
Word mentioned twice in URL? Bad for SEO?
Is a URL like the one below going to hurt SEO for this page? /healthcare-solutions/healthcare-identity-solutions/laboratory-management.html I like the match the URL and H1s as close as possible but in this case it looks a bit funky. /healthcare-solutions/healthcare-identity-solutions/laboratory-management.html
Technical SEO | | jsilapas0 -
Is it good to redirect million of pages on a single page?
My site has 10 lakh approx. genuine urls. But due to some unidentified bugs site has created irrelevant urls 10 million approx. Since we don’t know the origin of these non-relevant links, we want to redirect or remove all these urls. Please suggest is it good to redirect such a high number urls to home page or to throw 404 for these pages. Or any other suggestions to solve this issue.
Technical SEO | | vivekrathore0 -
Can Google Read schema.org markup within Ajax?
Hi All, as a local business directory, we also display Openinghours on a business listing page. ex. http://www.goudengids.be/napoli-kontich-2550/
Technical SEO | | TruvoDirectories
At the same time I also have schema.org markup for Openinghours implemented.
But, for technical reasons (performance), the openinghours (and the markup alongside) are displayed using AJAX. I'm wondering if google is able to read the markup. The rich snippet tool and markup plugings like Semantic Inspector can't "see" the markup for openinghours. Any advice here?0 -
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 -
Does anyone use pingler and is it any good
Hi, i have joined pingler and pay per month to use it but i have not seen any difference with traffic or google rankings and i would like to know if anyone else is using the paid version of pingler.com and if they find it a good service
Technical SEO | | ClaireH-1848860 -
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 | | Seiyav0 -
Is link cloaking bad?
I have a couple of affiliate gaming sites and have been cloaking the links, the reason I do this is to stop have so many external links on my sites. In the robot.txt I tell the bots not to index my cloaked links. Is this bad, or doesnt it really matter? Thanks for your help.
Technical SEO | | jwdesign0