system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What are work unions and how do they help employees?

In the recent Activision/Blizzard controversy I've seen the word union being thrown around a lot. Whilst I understand it is beneficial for employees, I just dont understand how it works.
gpt
A union is basically a club workers join that negotiates on their behalf with the company they work for and provides benefits for members like help finding a job, professional advice, arbitrating disputes, running pension plans, or providing monetary support.

Workers who are in a union can use their "collective bargaining" power to get better wages and conditions at work because all the workers negotiating as one unit has a lot more impact than a thousand people all trying to negotiate individually.