Player affiliation builds on the age grade registration process introduced to the game over the last three years, giving all players the opportunity to create and manage their own online account, and to link this account to the clubs they play for. It will allow two-way communication with those who are playing the game to make it a better experience.
Once affiliated, club administrators will still be able to use the membership management and player registration functionalities within Game Management System (GMS). In the age grade game, player registration has been replaced by ‘Player Affiliation’, but it will follow a very similar process to what has been rolled out over the last three seasons.
A more detailed explanation on player affiliation can be found here
Age Grade Regulation Updates for 2021-22