World ranking refers to a system that evaluates and ranks countries, athletes, universities, or other entities based on specific criteria. These rankings are often used to compare performance, quality, or achievements on a global scale. For example, the World University Rankings assess institutions based on factors like research output, teaching quality, and international outlook. In sports, world rankings are used to determine the standing of athletes or teams, such as in tennis or football. These rankings are updated regularly and can influence tournament seedings, sponsorship opportunities, and public perception. Overall, world rankings provide a standardized way to measure and compare excellence across various fields.