I have my main site (which has been up for about a year now) on a TLD however I've now created a second website from a folder in the main site i.e. www.example.com <-- has been up a year and www.example.com/help/ <-- has just been put up The /help/ is where I've housed the new site (a knowledgebase + forum) and I'm wondering if this is the way to go for where to house my support (which will grow over time) will it give my TLD more SEO juice? I've noticed places like Apple have their support on a subdomain (help.apple.com) rather than apple.com/help/ (pretty new to SEO and marketing - but need to get better!)
you also need to use a subdomain in order to get the Juice , if you just use example.com/anything , it will only increase the PA of that page anything , no overall benefit for the main domain
I don't think it will make an enormous difference but for something like that I would personally go with help.site.com rather than site.com/help
Actually when you use this kind of url "example.com/anything", search engine considers its as a normal website page and website page will not pass more link juice rather than subdomain like "anything.example.com". Thats why big company like apple use the subdomain strategy.