"Author Rank. Panda. Penguin. Mobile. Google+. If you think about it, these things were not on most SEO and online content marketer radars in the early 2011. But in just a year’s time, they have become major components of Web marketing.
Have you responded to these changes? Have you learned how to tap into the potential of these developments and increase exposure for your brand, traffic to your site, and money in your bank account?"
"Social sharing is becoming one of the most prominent ways in which to determine the authority of a particular page.
This is why Google has made some many changes to its algo: Because people are sharing so much content across the social web, it was time to evaluate how they were affecting search rankings".
Via Antonino Militello