I think that tipping the dealer is a practice in which players give a small amount of money as a gesture of gratitude for the dealer's service during a game, such as blackjack. This is often done when the player has had a good run or is appreciative of the dealer's professionalism and friendliness. While tipping is not mandatory, it is generally considered a customary practice in many casinos, especially if you have received excellent service, won a significant hand, or want to show support for the dealer's livelihood.