The importance of protection increases when there are multiple opponents. For example, if a hand is presently the best, but each of four opponents has a 1-in-6 chance of drawing an out, the four opponents combined become the favorite to win, even though each one is individually an underdog. With a protection bet, some or all of them may fold, leaving fewer opponents and a better chance of winning.
The term protection is also often heard in the context of an all-in player (see poker table stakes rules). A bet by an opponent serves to protect the all-in player by reducing the number of opponents the all-in player must beat. To deliberately make such a bet solely to protect another player's hand constitutes collusion.
A player may also be said to "protect" his or her cards by placing an object like a specialty chip or miniature figure upon them. This prevents the player from having his cards accidentally collected by the dealer.
See also
Categories: Poker gameplay and terminology