Tracing a picture in Photoshop is a way used to create a vector graphic from a raster picture. A vector graphic is made up of mathematical curves and contours, which makes it infinitely scalable with out dropping high quality. A raster picture, then again, is made up of pixels, which may develop into distorted or blurry when enlarged.
Tracing a picture could be helpful for a wide range of functions, resembling creating logos, illustrations, or web site graphics. It will also be used to transform hand-drawn sketches into digital information.