In tabletop role-playing games like Dungeons & Dragons, "casting time" refers to the duration it takes for a character to perform a spell. This can vary from instantaneously to several minutes, depending on the spell's complexity. Players must consider casting time when planning their actions during a game, as it can affect their strategy in combat or other situations. Casting time is important for both players and game masters, as it determines when a spell can take effect. For example, a spell with a casting time of one action can be used immediately during a turn, while a spell with a longer casting time may require the player to prepare in advance, making timing crucial in gameplay.