A flatbed scanner is a device used to convert physical documents and images into digital format. It features a flat glass surface where the item to be scanned is placed. The scanner uses a light source and sensors to capture the details of the document, producing a high-quality digital image. These scanners are commonly used in homes and offices for tasks like digitizing photographs, archiving documents, and creating PDFs. They are versatile and can handle various sizes of materials, from small receipts to large books, making them a popular choice for both personal and professional use.