Skywriting is a form of aerial advertising where a pilot uses an aircraft to create words or images in the sky with smoke. The smoke is released from the plane's exhaust and can be manipulated to form letters and shapes that are visible from the ground. This technique is often used for special events, promotions, or to convey messages. The practice of skywriting dates back to the early 20th century and has been popularized in various cultures. It requires skilled pilots and specific weather conditions to ensure the messages are clear and legible. Skywriting can be seen at festivals, celebrations, and even during airshows.