The term "Champions League" refers to a prestigious European football (soccer) competition that features top clubs from various countries across Europe. The tournament is also known as the UEFA Champions League, and it's considered one of the most elite club competitions in world soccer.
Teams qualify for the Champions League based on their performance in their respective domestic leagues. The competition consists of several rounds, including a group stage where teams are divided into groups and play against each other, followed by knockout stages that lead to the final match.
The winner of the UEFA Champions League is considered one of the best football clubs in Europe, and they earn the right to participate in the following season's tournament as well. The competition has a rich history, dating back to 1955, and it continues to be one of the most popular sporting events in the world.