ShowdownThe showdown is the final portion of a hand, where the remaining players show their cards and compare to see who has the best cards and is therefore the winner of the pot. The showdown takes place after the last round of bets have been made.
If one or more players have gone all-in, i.e. bet all their remaining chips, and it is no longer possible for anybody to make new bets, then the revelation of the cards that follows and the playing out of the hand (without any further betting rounds) is also called the showdown. For example, in Texas Hold'em, any remaining community cards would be dealt (without betting in between) and all players cards would be revealed to see who the winner is.