A pure strategy in game theory refers to a specific plan of action that a player will consistently follow in a game. This means that the player chooses one particular option or move, rather than mixing between different strategies. For example, in a game like Rock-Paper-Scissors, a player might always choose "rock" as their move, demonstrating a pure strategy. In contrast to mixed strategies, where players randomize their choices, pure strategies provide a clear and predictable approach. They are often easier to analyze in strategic situations, as they lead to definite outcomes based on the choices of all players involved.