Game theory is an interdisciplinary field of study combining elements of economics, biology, political science, psychology, and computer science. It provides mathematical tools and techniques aimed at helping to understand strategic behavior, whether by individual actors or groups of competing actors. In game theory, a game is a model of a strategic situation featuring two or more players. Players may be businesses in a market or different branches of government dealing with a certain policy issue. Games can also involve two types of players - rational agents and nature.

At its most basic level, game theory is the study of strategic problems, such as how to determine optimal decisions in an environment where competing players have conflicting interests. Game theory studies quantify the consequences of different strategies, helping to create an environment in which both parties can make decisions that lead to the most mutually beneficial outcomes.

Game theory is a powerful tool for understanding, predicting, and influencing the behavior of other players in a strategic setting. By analyzing scenarios from the perspective of both players and deriving the probability of various outcomes, game theory can help make rational decisions that maximize the chances of success.

Game theory can be used to make decisions for anything from business strategy to military operations to human resource policies. It is also used to understand human behavior in the context of games such as elections, poker, and chess. Game theory has applications in many real world scenarios, such as price competition, product releases, and negotiations.

Game theory can also be used to analyze decision-making in games that involve incomplete information, such as poker and guessing games. By using probability and expected values, game theory provides helpful tools to choose decisions that optimize our chances of winning.

Game theory is a valuable tool for making decisions in an unpredictable world. It is a useful way to model complex and diverse situations and helps to inform whether a decision is likely to be rational. By understanding the concepts of game theory, we can make better decisions and create the most mutually beneficial outcomes for ourselves and the stakeholders around us.