HR System is important because human resources management is never an easy job. It is complicated. From hiring, maintenance of employee data to intranet portals, as well as employee self-service and manager self-service, you really need an HR System to conduct the management.
A company needs to know on a cost level how many employees they have and the related costing, along with turnover rates and analytics to help them make decisions and understand the essential talent that makes the organization successful.