There is much mystery and confusion about "digital artwork" especially as there are many, easy to use, photo manipulation filters and apps that automatically convert photos to mimic a painting. These can be great fun but the results are soul-less and generic.
By contrast, the process I use to create my digital artwork is as complex and skilled as traditional hand painted work.
Starting from scratch with a blank screen and a digital "brush" (stylus) each painting takes many hours to create and the finished, unique portrait is then digitally saved to file.
The beauty of this media is that the portrait file, once created and saved, can be instantly delivered via e-mail and sent to print on any number of different surfaces, from greetings cards and canvases, through to mugs and even tee shirts....the choices are endless..... and all for one bargain price!