Stock and Flow Diagrams are visual tools used in systems thinking to represent the relationships between different components of a system. In these diagrams, a stock is a quantity that accumulates over time, such as the amount of water in a tank, while a flow is the rate at which the stock changes, like the water entering or leaving the tank. These diagrams help illustrate how various elements interact and influence each other, making it easier to understand complex systems. By analyzing stocks and flows, individuals can identify patterns, predict outcomes, and make informed decisions in fields like economics, environmental science, and engineering.