The biggest benefit to the PDF is ensuring that a document looks the same online as it does in print. Mac or PC, desktop or tablet, old or new system, a PDF will always look the way you meant it to look.
An accessible PDF can be held to the same standard – no matter what assistive technology is used (JAWS, NVDA, etc.), the same information is provided to the reader.
A tag structure within the document represents its visual and structural components (e.g., images and headings).
While PDFs are the most frequently used doc (for the reasons mentioned above), we also remediate program-specific documents like those for Microsoft Word, Excel, PowerPoint, etc.