Correction fluid is a liquid product used to cover mistakes made while writing or typing on paper. It typically comes in a small bottle with a brush or applicator for easy application. Once applied, the fluid dries quickly to create a smooth, white surface that can be written on again. This product is often used in offices, schools, and homes to fix errors in documents, notes, or letters. It is a convenient alternative to using erasers or starting over with a new sheet of paper, making it a popular choice for many people.