Personal Note is a new option to write down your opinion about a player by creating a note on their profile. In it, you can describe your impressions of his behavior in the game and, in the next meeting as a partner or opponent, know who you will be playing against.
You can find the "Personal Notes" button in the general information about a user's profile next to their statistics button.
You can leave notes in each user's profile. You can write a maximum of $50 per account. You can delete any of these whenever you want.
This is an option that is only visible to you! It is not accessible in any way to other players on the platform, including the player for whom you wrote a personal note. You also can't see other players' personal notes about you!