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 products is missing "price": Is this bad?
Hey guys, So a current client of mine has an e-commerce shop with a few hundred products. They purposely choose to keep the prices off of their website, which is causing errors in Google Webmaster Tools. Basically the error shows: Error: Structured Data > Product (markup: schema.org) Error type: missing price 208 items with error Is this a huge deal? Or are we allowed to have non-numerical prices for schema ie. "call for quote"
Technical SEO | | tbinga1 -
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 -
Website credits for designers - good or bad
Hi My core service is web design and development. I often place a credit on my clients websites pointing them back to my web design or web development pages. Is this a wise practice with penguin and panda updates? Would this also pull my ranking down?
Technical SEO | | Cocoonfxmedia0 -
Are 404 Errors a bad thing?
Good Morning... I am trying to clean up my e-commerce site and i created a lot of new categories for my parts... I've made the old category pages (which have had their content removed) "hidden" to anyone who visits the site and starts browsing. The only way you could get to those "hidden" pages is either by knowing the URLS that I used to use or if for some reason one of them is spidering in Google. Since I'm trying to clean up the site and get rid of any duplicate content issues, would i be better served by adding those "hidden" pages that don't have much or any content to the Robots.txt file or should i just De-activate them so now even if you type the old URL you will get a 404 page... In this case, are 404 pages bad? You're typically not going to find those pages in the SERPS so the only way you'd land on these 404 pages is to know the old url i was using that has been disabled. Please let me know if you guys think i should be 404'ing them or adding them to Robots.txt Thanks
Technical SEO | | Prime850 -
Is it bad to have same page listed twice in sitemap?
Hello, I have found that from an HTML (not xml) sitemap of a website, a page has been listed twice. Is it okay or will it be considered duplicate content? Both the links use same anchor text, but different urls that redirect to another (final) page. I thought ideal way is to use final page in sitemap (and in all internal linking), not the intermediate pages. Am I right?
Technical SEO | | StickyRiceSEO1 -
DISQUS COMMENTS backlinks-good for seo? YES/NO?
DISQUS COMMENTS backlinks-good for seo? YES/NO? I have just started commenting on "powered by disquus" websites in the Disqus comments box and left a link to my website in the name field! Having googled whether Disqus comments backlinks are any good for seo purposes i have discovered that there is a 50/50 view on the subject with some people saying they are a "goldmine" for getting high PR backlinks and others saying they are a waste of time because googlebot cannot read Java. My own experience of commenting on Disqus powered websites is that wordpress blogs powered by disqus comments ARE INDEXED by GOOGLE and the "BACKLINK IS IN THE SOURCE OF THE PAGE" When i comment on normal websites using the Disqus comment system i have found that my Disqus comments ARE NOT indexed by Google and there IS NO BACKLINK in the page source! Has anybody got any views on whether Disqus comments backlinks are any good?
Technical SEO | | Freebetsuk2 -
Use of + in url good or bad?
Hi, I am working on a SEO project for a client.
Technical SEO | | MaartenvandenBos
Some of the urls have a + between the keyword.
like www.example.com/make+me+happy/ Is this good or bad for seo?
Or is it maybe better to use - ? Thanks!0