The Nations League is an international football competition organized by UEFA for national teams in Europe. It was introduced in 2018 to provide more competitive matches and reduce the number of friendly games. The tournament is divided into leagues based on team rankings, allowing teams to compete against others of similar strength. Each league has its own promotion and relegation system, meaning teams can move up or down based on their performance. The competition culminates in a knockout stage, leading to a final tournament where the champion is crowned. This format aims to enhance the quality of international football in Europe.