This is the driver for Canon Inkjet Printers. It is a software utility that converts the data to be printed to the specific printer. The purpose of the printer driver is to allow programs to do printing without being aware of the implementation of each printer model. Whenever you print a document, the driver sends data to the printer with the correct commands. Windows will install generic printer drivers, however to get the most out of your printer, the Canon Inkjet driver should be installed.