Do they play a role as public signals?
Search engines says that public alerts have 2nd most priority as a factor that chooses seo positions. Social alerts have huge importance because the hyperlinks obtained in public networking are mostly organic. Facebook or myspace are without doubt the best public networking sites available today and when Search engines says public networking hyperlinks are important for ranking, it is quite organic for everyone to start publishing regular twitter posts and facebook wall up-dates to get public hyperlinks. In reality, Search engines does not even have access to the hyperlinks in Facebook or myspace. Here is a hand attracted infographic on this thought. You can spread the word. This does not mean that you have to give up Facebook or myspace promotion. Action in facebook and twitter posts is essential for marketing and interesting directly with customers. But when it comes to public networking alerts for the benefit of SEO, the options are to blog regularly in systems such as blog writer, hubpages and to motivate public activity such as submitting of public bookmarks. Now enjoy and share the visual. There is video towards the end of this visual which has He Cutts describing the role of facebook and twitter posts in SEO.