<p>What is MMR in League of Legends? Matchmaking Rating (MMR) is a hidden score used by Riot Games in League of Legends to evaluate player skill and create balanced matches. This system ensures players face opponents of similar skill levels, making games more fair and enjoyable. <a target="_blank" rel="noopener noreferrer nofollow" href="https://lolmmr.com/">https://lolmmr.com/</a></p>