Most popular is Etched Glass effect vinyl, designed to look like etched glass, with sticky back for window mounting.
Popular in providing privacy full or partial by cutting out graphics or leaving bands.
privacy films can be digital cutting out to large simple shapes such as lettering, logos and other block graphics, then mounted on a transfer paper for you to transfer onto glass. The transfer paper peels away afterwards to leave the lettering / graphic positioned according to the design you supplied.
This product is not generally printed, although can be to create additional effects such as colour gradients.