First things first, when I make this claim, I’m assuming that you have your own website, and that you’re operating an “onsite” blog. All this means is that your blog is part of your website. The posts that you write are indexed as part of your website content.
There are still many in the search engine optimization industry that are fighting the concept that Google (and Bing) is taking social signals into account at a high level when determining search rankings.
Go ahead and mark this down as the unpopular answer to the common question of the day. When people ask me what the secret sauce is in any truly successful search marketing program, whether through search engine optimization or PPC, my answer is never greeted with enthusiasm. The answer: manual effort.