The three main roles of HR are:

 Recruitment and selection:

HR is in charge of finding and hiring the best talent for the organization. HR also ensures that the hiring process is fair and compliant with the law.

 Training and development:

HR is responsible for providing training and development opportunities for the employees. HR helps employees acquire new skills, improve their performance, and advance their careers.

 Compensation and benefits:

HR is responsible for designing and administering the compensation and benefits system for the employees. HR also ensures that the system is competitive, equitable, and aligned with the organizational goals.

That's why some organizations may need to hire an HR consultancy service to help them with their HR needs. An HR consultancy service can provide expert advice, guidance, and support to help them with their HR need.