A-Z HTML Reference Guide for SEO – Doctype Tag
Today’s hmtl tag is the doctype tag:
Usage
<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
For more information on how to use the doctype depending on the version of the html you’re using, visit http://www.w3.org/QA/2002/04/valid-dtd-list.html
What designers should know about the doctype tag in terms of SEO
When you cut your psd file into html/css yo need to add this piece of code on the very top of each page.
What SEO’s should know about the doctype tag
The doctype document is not having any influence on your SEO job. However, make sure the designer added the tag on all page. Ohterwise, don’t mind about it.

