A recent tweet from Google’s Gary Illyes called attention to problem of invalid HTML. Google is fine with invalid HTML. Less well known is that there are negative outcomes associated with invalid HTML ...

Many top websites have invalid homepage HTML, yet still rank well. Machine-readable elements must be accurate, even if the rest of the HTML isn’t. SEO success depends on user-focused strategy, not ...

Various online services are available to validate the codes. For example, the HTML Validator add-on in Firefox, W3C Validator, and others can validate your code automatically. However, over a period ...