PDF conversion is the process of changing files from one format to the PDF (Portable Document Format) format. This is useful because PDFs preserve the layout, fonts, and images of the original document, making them easy to share and view on different devices without losing quality. Common formats for conversion include Word documents, Excel spreadsheets, and images. There are various tools and software available for PDF conversion, including online services and desktop applications. Many of these tools allow users to convert files quickly and easily, often with just a few clicks. Some also offer additional features, such as editing or merging PDFs.