System Dynamics is a method used to understand and model complex systems over time. It focuses on the interactions and feedback loops within a system, helping to visualize how different components influence one another. This approach is often applied in fields like economics, environmental science, and public health to analyze how changes in one part of a system can lead to unexpected outcomes elsewhere. By using computer simulations, System Dynamics allows researchers and decision-makers to experiment with different scenarios and policies. This helps in predicting the long-term effects of decisions, making it a valuable tool for strategic planning and problem-solving in various domains.