Imagine you and your friends love playing together every day. One day, some of your friends tell you that you shouldn't be friends with some other kids because they might take some of your toys or games away. This is not a good thing, right? This is called being mean to other kids without sharing, and it's not nice.
Well, big companies can sometimes act like this too! The big technology companies in Silicon Valley, like Apple, Google, Intel, and Adobe, were friends with each other but didn't want to share their employees. So they made agreements not to hire each other's workers.
This meant that if someone who worked at Google wanted to switch to Apple, they couldn't. Even if Apple offered them a better job or better pay, Google said no. This was not fair to the workers, who couldn't take advantage of better opportunities that could help them grow in their careers.
This was also not good for competition, which means when different companies compete to make better products and services. Without competition, there is less innovation and lower quality. Companies should compete by offering the best products, not by preventing workers from getting the best jobs for them.
So the employees sued the companies for breaking antitrust laws. Antitrust laws are rules against monopolies or agreements between different companies that hurt competition. The employees won and the companies had to pay a lot of money in settlement.
So, just like you should share your toys with friends and not prevent others from playing with you, companies should share their employees and not prevent them from switching jobs to grow their careers.