QUOTE(Taikun @ Aug 15 2012, 05:28 PM)
While Facebook is good for SEO (Facebook page likes), it is also good for marketing in general. If you get people to like your brand, you'll start to gain traffic through Facebook and like sites. Furthermore, Facebook Ads are a popular way to gain targeted traffic as well.
Now a days some webmasters and SEOs taking facebook as SEO technique but it is not something like that. It is social media site but yes we can use use it as SEO technique