Hi,Sub domains are also considered as a web page by the search engines of that particular domain, so it needs to be promoted before one can expect reasonable traffic to his sub domain. If you are not interested in spending money to promote your website, you can afford for doing free
SEO related promotion processes as follows:1. Directory Submission - One can do free general directory submission that may lead to free links which will help the website to get higher search engine rank.2. Link Exchange - Opting reciprocal link exchange can stimulate search engine ranking in long run.Regards,Ron Knight