Duplex printing is a feature of printers that enables them to print on both sides of a sheet of paper. It is also known as double-sided printing. Duplex printing can save paper and reduce printing costs, as it uses fewer sheets of paper. It is also an environmentally friendly printing option as it reduces paper waste. Many modern printers have a built-in duplex printing feature, while others may require manual flipping of the paper. It is mostly used to print double-sided documents, like- brochures, reports, and books.