I think this is an SEO question rather than WP, so hope I'm posting in the right place....
As we all know, one of the best ways to get traffic on a site is to create lots of pages of content. I noticed that many web dev sites will have a page based around a local keyword, and then simply hide that page from the menu/navigation bar.
However, would it be better from an SEO point of view to do posts instead of hidden pages? I'm wondering if posts get lost after a while from an SEO point of view where as pages seem more permanent?