A flat structure is an organizational design that features few or no levels of middle management between staff and executives. This approach promotes open communication and collaboration, allowing employees to have more direct access to decision-makers. It often leads to faster decision-making and a more agile response to changes in the market. In a flat structure, employees typically have broader roles and responsibilities, which can enhance job satisfaction and motivation. Companies like Valve and Zappos are known for their flat organizational structures, fostering a culture of innovation and teamwork by minimizing hierarchical barriers.