a good move is good or ok and you should play them. an excellent move = thumb up is a good move which you definitely should play but they are common. best move = star is a critical move which is essential for developing chess skill. great move = ! these moves are super good moves and in the 0 to 700 elo range can be quite rare and are essential for more advanced chess skills. brilliant move = !! is an insanely good move which is almost never played in the 0 to 1150 Leo range or maybe never played and if your elo is past 2000 you must play them but if your Leo is below 1400 they are not as essential.
A blunder = ?? is a move which either loses material or the whole game and you most certainly want to avoid them . miss = cross missing an opurtunity and these moves should be avoided usually. a mistake = ? is a bad move which you want to avoid and it can lose a pawn or worsen your position. inaccuracy = !? is a weak move which is ok or a little bad and why is inaccuracy an exclamation mark {great move symbol more on those later} and a question mark { mistake }. book move = book is a move which is part of the opening and you should play them. good move = marking tick.