What are the 3 most important functions of an HR department?

"There are many key functions of an HR department; however, if I had to break down what I believe to be the three most important, I would say Recruitment & Selection, Performance Management, and Learning & Development. A company must attract and hire the right team members since this can be key to an organizations' culture. I support this venture by ensuring its employer brand is on point, and we use sourcing strategies that match our brand messaging. Next, for Performance Management, I utilize bi-annual performance reviews with proven feedback tools related to the employee's performance. This step is critical in ensuring that we build a strong workforce for today and well into the future. Learning & Development comes hand in hand with Performance Management. I help my company to enable our team members to develop the required skills for a lucrative future with our organization."