Microsoft Word has its own built-in Save as PDF function. You may be wondering why you would use an online converter instead.
There are situations where an online converter produces a better or more convenient result. If you are working on a device without Microsoft Word installed, such as a phone, tablet, or a computer running only Google Docs or LibreOffice, you cannot use Word's built-in export. If you received a .doc file and do not have a version of Word that opens it cleanly, uploading it to ilovepdf.biz converts it without needing to open it at all. If you are working from a browser-based workflow and need to stay in the browser without switching to a desktop application, the online converter keeps everything in one place.
For users who do have Word installed and are already working in the application, the built-in Save as PDF is perfectly reasonable. For everyone else, and for .doc files and browser-based workflows specifically, ilovepdf.biz gives you the same quality result with no software required.