World Wide Web Consortium (W3C) allows internet users to check HTML and XHTML documents for well-formatted markup. Markup validation is an important step towards ensuring the technical quality of web pages.   Why Validate a Site on W3C? W3C validation is the process of checking a websites code to determine if it follows the formatting standards. If you fail to validate the pages of your website based on W3C standards, your website will most likely suffer from errors or poor traffic owing to poor formatting and readability.   1. Help Improve Rankings in Search Engines. W3C validation helps you to get better rankings