A while back, Facebook launched Sponsored Stories, an offering that allows brands to create ads from updates posted by a user’s friend or a page they are connected with. Similar to Twitter’s Promoted Tweets, this particular offering is designed to help marketers increase visibility and snag the attention of the people they are trying to reach without appearing too aggressive in the process. Facebook has made Sponsored Stories even more attractive to social marketers with a new feature designed to maximize its potential. Facebook recently announced the action spec preview tool. It is…