Project – Projects are a way of grouping related social initiatives and their reporting. A Project can represent a business, a customer or any other grouping of social accounts. For example, your brand may have accounts on Twitter, Facebook, etc dedicated solely to the support of your product. In this instance you may decide to group these accounts under a Project called Product Support.
Account – Accounts are the actual social properties: Facebook page, Twitter profile, Youtube channel, etc.
User – Users are the registered individuals that have authorized permission to access Projects.