PDF files are best for documents that need to look professional and remain unchanged. These include contracts, invoices, resumes, reports, eBooks, brochures, and forms. Any file that requires consistent formatting and accurate presentation is ideal for the PDF format. Educational materials and user manuals are also commonly saved as PDFs because they are easy to share and print. Since PDF files support security features, they are also suitable for sensitive or official documents. Overall, any content that must be distributed widely without losing its design or structure benefits from being saved as a PDF file. Visit https://pdf-file.com/ for more information.