A line manager has several management responsibilities, including direct management of employees, administrative management and functional management. Some line managers work directly with employees but do not have other responsibilities, such as administrative and functional management.
Some line managers also carry the title but only work with employees in the job function. In other words, many line managers have no bearing on the promotion or demotion of employees and have no effect on salary adjustments such as raises and pay cuts. However, a true line manager's function always involves working with employees, so a manager who does not have this relationship with employees does not qualify as a line manager.