Answer:
Represent the Interests of workers in employment matters.
Step-by-step explanation:
In an organization, there will often come times when an employee starts to feel that the pay he/she is getting is not enough or may face other issues related to management. It would not be easy for him/her to complain or even express his/her feelings if he/she works under a very strict boss. So, to solve such issues employees collectively form a Labor Union which works for their interests.