Transforming a scanned signature into vector artwork in Adobe Illustrator offers several advantages. First, you can enlarge the resulting drawing exponentially without pixelation or distortion. Second ...
If you work with computers sooner or later you’re going to find you need an image that is in a raster (AKA bitmap) format (e.g. .gif, .jpg, .wmf) translated to a vector format (e.g. .svg, .cgm, .dwg).