A workspace is an area where you can have jobs for that specific department. So for example you can have a Marketing Workspace, Account Workspace, Sales Workspace, etc.
Each workspace can have an infinite number of jobs under that workspace. So for example under an Administrative Workspace, you can have a job role for Admin Support, Tenant & Owner support, etc and they will all fall under one workspace.
Each workspace can have a manager controlling the jobs in that workspace, so if you as the employer assign one workspace to one of your managers say Maintenance, then your Maintenance manager will then be able to hire and pay through that one workspace.