A Decision Tree is a visual representation used to make decisions based on a series of questions or criteria. It resembles a tree structure, where each branch represents a possible outcome or decision path. The root node starts with a question, and subsequent branches lead to further questions or final decisions, making it easy to follow the logic behind choices. Decision Trees are commonly used in various fields, including machine learning, data analysis, and business strategy. They help simplify complex decision-making processes by breaking them down into manageable parts, allowing users to visualize potential outcomes and make informed choices.