Wingtip devices are aerodynamic features located at the tips of an aircraft's wings. They are designed to reduce drag and improve fuel efficiency by minimizing the formation of vortices, which are swirling air patterns that occur when air flows over the wings. Common types of wingtip devices include winglets and raked wingtips. These devices enhance the overall performance of an aircraft, allowing it to fly more efficiently and with better stability. By improving lift-to-drag ratios, wingtip devices contribute to lower fuel consumption and reduced greenhouse gas emissions, making them an important aspect of modern aviation technology.