What social media ads are the most effective?

In a new study, Psychster tested examples of seven types of ads on both Facebook and Allrecipes.com, the popular recipe and cooking site. The ad formats included banner ads, newsletters, branded profiles with a reciprocal logo, branded profiles without reciprocal logo, "give widgets," "get widgets" and sponsored content and were shown to 478 Allrecipes users and 681 Facebook users. The study found that while sponsored content ads were the most engaging, branded corporate social media profiles increased intent to purchase.