A community card is a shared card on the board that can be used by any player to make their strongest possible hand.
It’s mostly used in community card poker variations. In each variation, the dealer shares these community cards face-up on the table, and the full set of cards on the table is called a board.
For example, in Texas Hold’em poker, there are five community cards players can combine with their two hole cards to make the strongest possible hand in a given situation.
The community cards are unveiled in three phases. During the “flop” phase, the dealer reveals the first three cards.
After that, during the “turn” phase, the dealer puts an additional card on the board. Lastly, during the “river” phase, the dealer puts up the fifth and last card.