This is a follow-up on my popular video "Memorizing the chessboard" https://www.youtube.com/watch?v=yKBvVigyWcs
You do not have to do this! My method is what I consider best practice if you insist on improving your visualization, but just by playing games and being mindful of the factors I explained in my memorization video you will steadily improve your visualization. Good memory is not necessary to get good at chess.