Image tracing in Photoshop is a technique used to convert a raster image, such as a photograph or a scanned drawing, into a vector image. Vector images are made up of paths, which are mathematical curves that define the edges of the image. This makes them infinitely scalable, meaning they can be enlarged or reduced without losing any quality.
Image tracing is a powerful tool that can be used for a variety of purposes, such as creating logos, illustrations, and web graphics. It can also be used to clean up and improve the quality of existing images. There are a number of different image tracing methods available in Photoshop, each with its own strengths and weaknesses.