A reinforcing loop is a concept in systems thinking where a change in one element leads to further changes in the same direction. This creates a cycle that can amplify effects over time. For example, if sales increase for a product, more advertising may be generated, leading to even higher sales. These loops can be positive or negative. In a positive reinforcing loop, growth continues to accelerate, while in a negative loop, a decline can worsen over time. Understanding reinforcing loops helps in managing systems effectively, whether in business, ecology, or social dynamics.