This will be short and sweet.
This post really translates into “Don’t use subdomains”.
Subdomains are treated as unique web sites by search engines. So you are effectively parsing out your web site’s search engine juice and importance across multiple unnecessary domains, thus reducing traffic as a whole to all of them. It is best to keep your products and articles and additional content in folders on your main site than to split them up into subdomains.
Tags: Search Engine Optimization, SEO, Subdomains