David Griner has joined Adweek as a social editor, after serving as vice president and director of digital content at Luckie & Company. Also, Michelle Castillo, a former CBSNews.com associate producer, has joined as a digital media reporter. Lastly, Christopher Heine has been promoted to digital editor, after serving as a staff writer since June 2012. He joined the publication from ClickZ. See what’s behind the latest creative ads on Facebook.

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