In the game of football, an signal is when the QB, just before the start of the play, changes the pre-determined play at the line of scrimmage. Essentially, it's a last-minute adjustment! The quarterback might notice https://xem-bng-trc-tip-ko-nh-ci717901.glifeblog.com/40689878/what-represents-an-signal-in-the-nfl-a-simple-guide