Facebook is changing how customers interact with brands on its platform by allowing users to write on brand walls without liking them first and removing discussions. This is altering customer expectations of service. Some brands ignore customer service on Facebook, some discourage it, while others embrace it as a way to handle customer queries. To prepare, retailers should train customer service staff on social media, set internal service level agreements and policies, and map out how past crises might have played out on Facebook to plan responses. They should also organize by time of day, measure responses, and coordinate with other marketing channels.