Showdown
The end of the hand: remaining players reveal, best hand wins the pot.
River, board Kd 9h 4c 2s 7d. Two players left: the button holds Ad Kc for top pair, top kicker; the big blind holds Qs Qh, a pair of queens sitting under the board king. Both check, both table their hands, and the dealer reads it out: the button's pair of kings beats the queens, button takes the pot. That's showdown — no more betting, no more bluffing, cards face up and the best five-card hand wins.
Showdown is the only place a hand wins on strength instead of pressure. Every bet before it is an attempt to end the hand early — fold out a better hand, or build a pot you expect to win once the cards turn over. Knowing you're headed there changes how you bet: a made pair with a solid kicker can check and take a free look, while a hand that beats nothing at showdown has to bluff or give up. Position helps too — acting last, you see what your opponent does before you commit your own chips.
The common beginner mistake is showing a losing hand out of curiosity or tilt. Only the last player to bet or raise has to show first; everyone else can muck without revealing a thing. Flash a hand you didn't need to show and you hand opponents free information about how you play, for nothing in return.