When you used a image/animation then send it to the item it will go on used libary images Those images that you made will be saved in there forever and you can delete them they will always be private it will appear on a images your picking on like if you made a really GOOD piskel art. but dont have a account to save one? you can. Its for lazy people who doesent want to go on a website piskel so instead they will use the Used libary that they used before and of course you can copy the images.
Yes,its good for lazy peoples xD