Page Description Languages (PDLs) are specialized programming languages used to describe the layout and appearance of printed pages. They provide instructions for how text, images, and graphics should be arranged on a page, allowing for precise control over the final output. Common examples of PDLs include PostScript and PDF. PDLs are essential in the printing industry, as they enable printers and software to interpret and render documents accurately. By using PDLs, designers can ensure that their work appears consistently across different devices and platforms, maintaining the intended visual quality and formatting.