A Workspace is an instance of Hearsay. There can be multiple users in a Workspace (such as assistants or delegates you've invited to help manage your Hearsay account) but only one Workspace owner. The name of the Workspace is based on the first social media account that was linked to your Hearsay account.
To switch between Workspaces, select the drop-down menu with your thumbnail photo. Select the Organization (if applicable) and Workspace.