Social media and usability are words rarely expressed in one sentence. Publishing in social media means adherence to a strict corset: the services limit the length of texts, unify the appearance of messages and profiles, and define the interactions enabled around them. If usability in only seen as a question of easy-to-use and smooth interfaces, the means to make an impact are indeed limited. But considering technical usability along with context of use and individual worth for the user, communication professionals can largely improve the usability of their organisations' social media channels.