converting the document to a PDF - which means that anyone can view it in its original formatting as long as they have the free Acrobat reader installed. This means that they don't have to have MS Word installed on their machine. It also means that nobody can edit the document and pass it off as your original, and this can have distinct security and copyright advantages.
I generally include a link to the reader download site
click here next to, or near the download link, so people who don't have the reader can get it easily.