Validation is a procedure to check HTML code for compliance with standards and requirements of the W3C (World Wide Web Consortium). Webmasters should strive to ensure that the code does not contain errors. This guarantees the correct display of web pages on different devices (desktop, mobile phone, etc). Some SEO experts believe that the validation can help you get better rank in the SERP.
It is important to remember that the validation checks mainly syntax correctness of the code, but can not find semantic errors.
Among the most ubiquitous HTML errors include:
Use our widget to know about the problems of validation.