Human resources is all things related to workers including personnel.
No, there are thousands of companies operating without a physical Human Resources Department. However, you need space to make sure you have all essentials needed to hire and manage your employees/staff.
Turn over rate meaning is the loss of employee from a workplace over a period of time. In the worst is when employees quit or have to be dismissed.
This means 80 percent of the problems are caused by 20 percent of the employees. They normally have problems in the workplace that needs to be addressed immediately.
Talent management is basically recruiting, training, managing, developing, and retaining a company's best employees. These are a company's highest potential employees.