Raster images are a grid of pixels; vector images are mathematical paths. That single difference decides whether your logo can scale to a billboard or stitch onto a cap.

When to keep raster: photography, web previews, anything where pixel detail is the point.

When to rebuild: logos, badges, monograms, illustrations that will be printed, cut, or embroidered. A manual vector rebuild keeps the character of a hand-drawn mark while making every curve mathematically clean.