Does Google Penalize For W3C Coding Errors
W3C Markup Validation Service And Google Errors
Google take malware and hacking quite seriously and in general know which codes to look for, but it is advised to keep your pages clean of code errors and to use the W3C validation service at validator.w3.org
Always remembering that different browsers interpret code errors differently, some browsers more supportive than others. Depending on the code errors and how excessive they are may result in the browser not rendering the page correctly, resulting in bad user experience.
Matt Cutts had the following to say with regards to invalid HTML and coding error penalties:
"So Google does not penalize you if you have invalid HTML because there would be a huge number of webpages like that and some people know the rules and then decided to make things a little bit faster or to tweak things here there and so their pages don't validate and there are enough pages they don't validate that we said OK this would actually hurt search quality if we said only the pages that validate are allowed to rank or rank those a little bit higher."
"Now I wouldn't be surprised if they correlate relatively well, you know maybe it's a signal we'll consider in the future, but at least for right now do it because it's good for maintenance, it's easier for you if you want to change the site in the future, don't just do it because you think it'll give you higher search rankings."
In other words, Googlebot does not care about valid HTML.
Google And W3C Both Show Coding Errors
As per above image you can see Google don't give two hoots about W3C Validation. LOL, and neither does W3C themselves the people that police web coding, the same people that are on a prerogative quest of promoting zero errors and clean coding that neglect to use the alt attribute on images!!?
I don't know whether to laugh or to cry.
Google Matt Cutts Shows W3C Validation The Middle Finger
Matt Cutts on Twitter found this religious joke comical (now we can see were Google inherited the code error attitude)
Matt Cutts @mattcutts Nov 20 @ftrain "The percentage of pure and valid HTML on the web is probably the same as the percentage of Catholics who marry as virgins" Love it
Matt Cutts is head of the Don`t Be Evil WebSpam Team, creator of Panda and Penguin the illusive elemental Cyber beasts that show no mercy or remorse. Once unleashed these Cyber beasts run amok crashing websites nearly driving sane members of society to only available unleavened suicide.
That`s Matt Cutts. And he himself thinks valid HTML is a jock and basically non-existent. So therefore I doubt whether they penalize for coding errors, if so they'd need to penalize themselves and W3C.
Who Is W3C Validation
W3C Validation Service (validator.w3.org) are members of the "new alliance of desperadoes", desperate for power and controlling the internet as we now know it, dictators of languages used on the internet.
Cutting a long story short, W3C are trying to standardize web languages.