Some people (including myself) would argue that standards compliancy is the first step towards a universally developed Internet where websites are far more browser compatible and users have better/more reliable experiences.

I would also say that Google as an industry leader has a responsibility to 1. Be compliant and 2. Reward sites with higher rankings or at least a slight boost for being compliant.

First, I completely agree with Jesse. It is time we stop this debate about valid code. First of all, I am never sure why we do have it, as I have NEVER coded a site that was not W3C compliant. That is like being in construction and saying, well the concrete still works (mostly) even if I do it wrong. Time to get past this discussion. Do your code and be valid & yes you can support every browser/platform out there better with valid code. If you cannot, you need to learn more about how to code. That becomes a person in chair issue.

Second, while it is true that Google does not "give any sort of boost to web pages that validate". It does not mean that the things in valid (and accessible) code do not help your website do better in the rankings. While it is a slight distinction, it is a true one. I (and other SEO's agree (of course others deny it vehemently)) sites can do better when the only thing on the site that changes is the code. Improved code to text ratios is one factor that it helps, but there is more than just that. However, will leave this discussion at that.

Thanks for listening!

I have been marketing and outsourcing websites for 10 years now. I have never once validated a website. I have consistently had and have websites rank well above average driving thousands of visitors per day in some cases to each website. As long as the user experience is not harmed in other browsers I don't see the issue. This is a way for people that aren't getting ranked to complain about the system or game. Its a classic "Don't hate the player, Hate the Game" scenario.

Hopefully, this will end the debate about SEO benefits for W3C friendly pages.
It already lasted way too long...
Merci merci merci

Hopefully, this will end the debate about SEO benefits for W3C friendly pages.
It already lasted way too long...
Merci merci merci

Attempting to parse web data, writing a crawler, or a browser makes it clear that nearly no one follows strict html and http specification 100% of the time.

The browsers have a lot to do with this as they have created so many fixes for common violations that pages completely out of specification will render just fine, and so the web develops.

Standards aren't just about the rankings, they're about having compatible websites that work. And sure not _all_ websites validate, but most of the ones created by professionals do, and they're the most important ones.

Personally, I don't validate websites just because I want them to do well, I validate them because it produces (most of the time) a website that works across most browsers, is accessible and so on and so forth.

Does Google really NEED to validate? The code they're using isn't simple and, in some cases, revolutionary. So they don't _need_ to. Whereas a website like mine _should_ validate because I'm a front-end developer and SEO, so it's a standard. It makes me stand out from the rest.

Why believe what Matt Cutts says? I mean, really, why would you?

BB

Agree with Luke, getting the listings is good but the conversion rate depends on usability and functionality.

Saying that HTML validation does not affect SERPS is misleading. Bad code to content ratio can lead to problems [even penalties], DTD needs correct syntax, can affect indexing speeds. There are a number of indirect affects that can affect a site's performance and ultimately SERPs.

Interesting that Google's own Website Optimiser tool forces you to put unbalanced HTML tags, stating that:

"It will cause a problem, however, if your CMS doesn't accept unbalanced tags. There is no current Website Optimiser workaround for this situation."

Well put Luke.

Basically take pride in your work. A site that validates is a well oiled machine. A site that doesn't is a rusty tractor that works...sometimes.

Validating your site does matter for SEO!

A valid site allows you to get links from 100's of design and CSS directories that wouldn't be possible without.

Forget the rest of the reasons - from a purely SEO perspective validating brings more links and thus more potential rank.

In the near future, google has to see W3C validation as important as the upcoming web designers now in schools learn to build so.

Agreed - Matt Cutts is not an authority on anything. He is a mouthpiece and spreads more misinformation that anything. He does not eliminate FUD, he generates it. Why he is allowed to spy on SEO's at SEO conferences is beyond me.