Website Standards and Validation
The quality of a website is are judged by how well it adheres to certain standards and technical specifications that are provded for guidance in the industry. These standards apply to the way that the websites are coded, structured and styled.
WEBSITE VALIDATION TO W3C STANDARDS
The World Wide Web Consortium (W3C) is the international consortium that is generally accepted as the main website standard setting organization.
Members of staff of this organization work with the general public and the web design community towards the development of appropriate standards in website construction.
W3C's mission is "... to lead the World Wide Web to its full potential by developing protocols and guidelines that ensure long-term growth for the Web".
As part of their remit W3C provide an online validation tool, which can be used to test that the mark up on websites is valid, in other words that it has been coded properly. You should consider checking your website to see if it complies.
In fairness, failure to validate and the errors that you are likely to see do not mean that a website will not work or that it will be penalised by Google. Modern browsers like Internet Explorer and Firefox are very tolerant of minor errors and they will normally still be able to render the page properly but it is recommended that where possible these errors are corrected.
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