A PDF, or Portable Document Format, is a file format created by Adobe that allows documents to be shared and viewed easily across different devices and operating systems. PDFs preserve the original layout, fonts, and images of a document, making them ideal for sharing reports, forms, and eBooks. One of the key features of PDFs is that they can be viewed without needing the original software used to create them. This means you can open a PDF on a computer, tablet, or smartphone and see the same content, regardless of the device. This versatility makes PDFs a popular choice for both personal and professional use.