Global University Rankings are systems that evaluate and compare universities worldwide based on various criteria. These criteria often include academic reputation, research output, faculty quality, and student satisfaction. Popular ranking organizations include QS World University Rankings, Times Higher Education, and Academic Ranking of World Universities. These rankings help students, researchers, and policymakers make informed decisions about higher education. They provide insights into the strengths and weaknesses of institutions, guiding prospective students in choosing where to study. However, it's important to note that different ranking systems may use different methodologies, leading to variations in results.