Matchmaking Rating (MMR) is crucial in battle arena games as it determines the skill level of players in a match. A higher MMR means tougher opponents, which fosters competitive gameplay and helps players improve. Balanced matches based on MMR create fairer experiences, making the game more enjoyable and challenging for all participants. MMR ensures a rewarding and skill-based progression.
There are many games that use the MMR system in Games such as League of Legends MMR system (Hidden score but some users check it through League of Legends MMR checkers such as lolmmr.com)