PDF is a versatile document format supported by many different programs and devices. So why not convert your documents or ebooks to this format?
Software for Windows and Mac OS X computers, as well as apps for many smartphones, can open PDF files. Most web browsers such as Chrome and Firefox can display PDFs too. The same goes for most ebook readers. If you cannot find the right ebook format for your reader or are tired of converting back and forth, converting to PDF is a safe choice.