Advocacy for good causes involves the promotion of solutions to important problems. Examples of advocacy careers include working in politics or journalism, or becoming a manager or a grantmaker at an influential organization.
According to 80,000 Hours, advocacy can be a particularly effective way to make the world a better place, because it is scalable, relatively neglected, and less competitive than many other career approaches (especially earning to give).
80,000 Hours. 2016. Why the ideas you’ve heard for doing good with your career aren’t the best.
An overview of advocacy as a promising career approach.