Currently, we don’t have a feature set up that would allow you to upload a document directly to the site for your guests to view or download. Adding a feature that would allow for directly adding documents to the websites is a popular request and it is on our list of suggestions for potential future improvements.
However, you may publish the document on Google documents (for free) and insert the link into your wedding web site.
Here is the link to Google Documents: https://www.google.com/docs
Once you have published the document, you can copy the link provided and paste it into your website pages. Then, when your guests follow the link to the document, they will be able to view, print, or download it.