Vuffy - 9:33 pm on Oct 1, 2012 (gmt 0)
Hi, thanks for your reply.
My site has a big user base, generating about 7,000 new posts per day. So getting fresh content isn't really an issue. (So that's +1 for freshness algo)
For years, I've never had to bother with link building/or keyword monitoring since everything happened naturally, until 2012. I will do as you suggested and try to analyze my pages that dropped.