My question is simple and direct. Is there anything we can do SEO wise to influence how Google (and perhaps other SERP's) appear? I would guess one needs to provide a category structure to Google somehow right? Would this be an META tag entry?
Google create output of and quarry with the help of algoritham. If you follow this your link will infulance
In second I think you are asking about site map its not really important but we need it to make our site much search engine friendly.