In the world of computers, a print processer or printer driver is software that transforms data to be printed to a new form that is understood by the printer. The main aim of this software is to let the applications print without being aware of each printer model’s technical details.
The two terms – printer drivers and print spoolers are different. Print spoolers queue print jobs and then sends them to a printer, successfully.
Generally, computer needs to be aware about the printer’s characteristics. PPD files are simple ways to transfer this information to computer. They have the benefit of being independent from system, and there’s an availability of large database for them called Foomatic.