A dominant strategy is a concept in game theory where a player's best choice is the same, regardless of what the other players decide to do. This means that, no matter the actions of others, choosing this strategy will always yield the highest payoff for that player. For example, in a game involving two competitors, if one competitor consistently benefits from a specific action, that action is considered their dominant strategy. Understanding dominant strategies helps in predicting outcomes in various scenarios, such as in economics or competitive business environments, where players aim to maximize their benefits.