Your rating of 1 to 5 stars increases continuously by winning games, as winning games increases your rating points. The stronger your opponents are, the greater the increase in your rating points.
Once your rating points reach certain thresholds, your rating will increase and you will receive another one of five stars—or you might have one deducted.
Your wins and losses will have no effect on your rating if you play with the Training custom rule!
For more detailed information about rating points and stars, visit our info page on the topic.