About saving and publishing Web sites
When you create a Web site using Publisher, you create a Web publication that is a Publisher file (.pub). When you publish this Web site to the Web, Publisher converts your.pub file to filtered HTML files and then exports these files to the destination you select.
For best results, you should edit your Web site as a .pub file in Publisher. To make changes to your Web site, you should keep a current version of your Web site on your local computer as a .pub file. If you are using an external FTP program to publish your Web site, and you need to save your Web site as an .html or .mhtml file before you publish it to the Web, you should also save a current version as a .pub file. When you want to make changes to your published Web site, edit this original .pub file, and then publish it to the Web again to replace your published Web site with the updated version.