The article discusses how Decision Theory can help individuals and businesses make better decisions in real-life situations. By using methods like the Tree method and Payoff matrix, Decision Theory helps identify problems, available options, and the best course of action. It also covers decision-making under certainty and uncertainty, as well as criteria like Maximax and Minimin. The research shows that Decision Theory is significant in solving problems, understanding uncertainty, and visually representing decision processes through Decision Trees.