Why air crafts use winglets?

Aircraft use winglets to improve fuel efficiency and reduce drag. Winglets are vertical extensions at the tips of wings that help mitigate vortex formation, which occurs when high-pressure air from beneath the wing spills over to the low-pressure area above. By minimizing this induced drag, winglets enhance lift-to-drag ratiOS, leading to lower fuel consumption and improved overall performance. Additionally, they contribute to reduced noise and environmental impact.