A smoothing plane is a hand tool used in woodworking to create a flat and smooth surface on wood. It features a sharp blade that shaves off thin layers of wood, allowing for precise control over the finish. Smoothing planes are typically used after rough shaping to refine the surface and prepare it for finishing. These planes come in various sizes and designs, with the most common being the jack plane and the block plane. Proper technique and maintenance are essential for effective use, ensuring the blade remains sharp and the tool is adjusted correctly for optimal performance.