With the series Advancement for Low-Wage Workers, Jobs for the Future seeks to elevate discussion of this critical issue within and outside the workforce field. These occasional papers address public policy and on-the-ground practice. The Next Challenge, the series introduction, argues for placing not just employment but also advancement at the center of employment and training policy. It defines career advancement as a goal, explores key challenges and opportunities, and highlights strategies to help significantly more low-skilled workers move up to better jobs and family-supporting earnings.