In scrabble, how does the Elo rating system work?

Elo ratings rise and fall due to a player’s skills and ability to win. There is a personal Elo rating for each player in the game, calculated based on all wins, losses, and draws in previous games.
Player’s Elo rating and number will rise the more wins they have. Elo ratings will be lower if there are more losses. A Scrabble player’s Elo rating depends on what they want from the game. It will be helpful to learn Elo if you have a large group of players and if you’re interested in playing at the club- or state-level.
However, Elo isn’t much use if you like playing casually in a small group or on infrequent occasions.