MMR is your Matchmaking Rating. It is a number value between 0-2500+ that Riot gives to players to determine how strong they are when compared to others. So, titles like LoL have to develop private matchmaking metrics, that allow players to be fairly placed against opponents.

What is MMR based on LoL?

MMR is a very broad term that is not exclusive to League of Legends by any means, and it stands for Matchmaking Rating. It is a value that determines the skill level of each player. This value is used in matchmaking and team selections in multiple online games.

What is Elo and MMR in League of Legends?

MMR in League of Legends ( also known as Match Making Rating or Elo ) is a statistic on which the game bases the players in your match. If your is higher than the average Elo of your division, you will gain more, and lose less LP per win or a defeat.