If there were any doubts that Facebook is serious about its feature, a recent personnel move should quell those doubts.

Facebook confirmed that longtime vice president of platform will turn all of her attention to Marketplace, the shopping and listing feature the social network introduced last October, changing her title to vp of Marketplace.

Former director of product management Eddie O’Neil succeeds Liu as vp of platform, and he will oversee analytics, Facebook Login, account recovery and support for developer community products including software-development kits and application-programming interfaces.

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