Double-sided printing, also known as duplex printing, is a feature that allows a printer to print on both sides of a sheet of paper. This process can be done automatically by the printer or manually by flipping the paper after the first side is printed. It helps save paper and reduces printing costs, making it an environmentally friendly option. Many modern printers, including those from brands like HP and Canon, come with built-in duplex printing capabilities. This feature is especially useful for printing documents, reports, and presentations, as it allows for a more compact and organized presentation of information.