Sometimes people need help because they have been treated unfairly or their rights have been taken away. Cause lawyering is when people who are lawyers decide to help these people by using the law to make things better.
It's like being a superhero, but instead of a cape, the lawyer wears a suit and uses special documents called laws to fight bad guys who are not following the rules. The lawyers work hard to understand the laws and then use them to help people who are not being treated fairly.
For example, if some people are not allowed to go to school because of their skin color or where they come from, cause lawyers will use the law to make sure they can go to school just like everyone else.
Cause lawyering is important because it helps make the world a fairer and more equal place for everyone.