Welcome to the Q&A Forum

The reason I ask about the seo folder is because "seo" isn't usually something that's separate from any of the rest of your site--folders, or otherwise. Rather, it's something that is integrated into the site's words, pages and programming so as to not even identifiable as seo--just proper best practices. When a site's services pages are optimized, for example, they end up being just plain ol' services pages--it's just that keywords have been properly researched and utilized, internal link anchor text has been researched and properly implemented, page titles and metadata have been thought out, etc. The same goes for the homepage and all the site's other pages. You may already know all this and I'm being overly simplistic for you here. If so, my apologies, but I wasn't quite sure from your question what you were looking for.