An Automatic Document Feeder (ADF) is a device that allows multiple pages to be fed into a printer or scanner automatically. This feature saves time and effort, as users do not need to place each page manually. ADFs are commonly found in multifunction printers and copiers, making them ideal for handling large documents. The ADF works by using rollers to pull the pages through the machine, scanning or printing them one at a time. This technology is especially useful in offices where large volumes of paperwork are processed, enhancing productivity and efficiency in tasks related to document management.