I'm developing a forum currently and am trying to decide whether to make the forum a subdomain of my site or have it as a folder within the site ie forum.myexampledomain.com or myexampledomain.com/forum As I'll be using the forum to hold ads as a source of revenue for the site, I need to make sure I get the best practise method to get the full SEO potential and want to make sure it go the right path initially. Does anyone have experience of this. Also, promoting a forum/getting initial posts and members on there- what is the best method to acheive this. I don't want it to look like a ghost town when it's first launched.! Any help is appreciated. Thanks.