Digital rub ons are the digital equivalent of the traditional rub-ons from craft stores. Digital rub ons are black “shapes” you can drag and drop into your layout, add styles to, blend in and modify in any further ways. Often they have cut out edges to simulate traditional rub-ons.
Here is a rub-on:
When you look close at the image you can see small cut-outs such as you’d find them when you use traditional stamps.