• Upload your documents to  your Google Drive
• 
  Use the
  "Add from Drive" link to find the document and select them (you can select more than one at a time.)
  

You can upload documents from your computer directory to this page with the little "Add file" link.  Your document will always open in a separate window for your viewer.

You can create folders to organize the files you have below into folder for your viewers to easily find what they need.

If your document is a Google Doc, when changes are made, they will automatically be updated the next time a viewer looks at your file.   Use Google Drive's  "Manage versions" to update other documents.  For more information on Manage versions watch the 'Documents" video above.