Since Social Networks are selling like hotcakes to users, don't get confused if you are still in doubt if search engine has anything to do with with. Yes, they are connected and this will proves how powerful Social Networks to Organic Rankings
Google and Social Networks
As Google focuses into PageRank (still?), the more relevant content you post, the higher ranking you get. But, if your link tweeted for hundred of times by big movers and shakers, they will affect your standing and manages for your ranking to grow. It also happens on the same thing with Facebook, the more users posted your link on their walls, link sharing is more prioritize for both Twitter and Facebook. Authority counts, not how many of users posted your link.
Bing and Social Networks
Be subjective on your tweets and posts will influence your ranking. On Google, the number of people who re-tweets helps to boost your rankings.
Facebook and Social Engine Rankings
Since, Google and Bing admitted that they started to love Facebook for search rankings, the only hassle is Twitter is more public than Facebook. The more users of Facebook, the better potential for your message to reach the target audience.
Twitter
Boosting your ranking through Twitter may able to get immediate buzz on your products/services you want to offer. Yet, Facebook has the final words.
The Future
Although links are no follow, you can easily see the difference when social sites reflect on search engines. Thinking of how organic it is, but having a social presence will benefit the entire internet marketing campaign. Gaining more audience through Facebook and Twitter, let us see if these social network sites will be battling around in the future.
source: iblogmarketing