XHTML Validation serves the purpose of rechecking our site to see if it follows the W3C standards. It not only ensures quality, but also teaches us good coding practices and thereby eases maintenance. Validating one's code before taking it live serves as a sign of good professionalism in a coder's career.
Common errors found during XHTML validation are listed below:
1. Not closing empty tags. Empty tags are tags that do not contain any content.