In poker, a check-raise is a play where a player checks when it is their turn to act, intending to induce a bet from another player, and then raises that bet once it is made.
The check-raise is a powerful move because it can create a larger pot and also give the impression that the check-raiser has a very strong hand, potentially causing opponents to fold. However, it is important to use the check-raise strategically and not overuse it, as opponents can catch on and adjust their play accordingly.