This document summarizes the Global Women's Leadership Initiative Index, which tracks women's representation in leadership positions across over 195 countries. It aims to achieve 50% representation of women in leadership by 2050. The index measures progress across three pillars: pathways to leadership, positions held, and formal/informal power. It finds that education, part-time work, and public administration help advance women's leadership. Higher representation of women is linked to better governance. The index collaborates with UN agencies and other partners to monitor trends and support achieving gender parity in decision-making worldwide.