PDF (Portable Document Format) is a widely used file format that allows for the secure and reliable distribution of electronic documents. It preserves the formatting, fonts, images, and layout of a document, regardless of the software or operating system used to view it. PDF files can be created from various sources, such as word processors, spreadsheets, and design software, and they can be easily shared, printed, and viewed on different devices. With its universal compatibility and compact size, PDF has become an essential tool for sharing and archiving digital content.