Why should I create a site map?

Google™ spiders your site and stores pages it thinks are important in it's (huge) database. With a sitemap you can list all your categories

Google Sitemaps is an easy way for you to help improve your coverage in the Google index. It's a collaborative crawling system that enables you to communicate directly with Google to keep us informed of all your web pages, and when you make changes to these pages.
From: https://www.google.com/webmasters/sitemaps/login

===Insturctions for install===

1) upload the files to your addons folder

2) log into google webmaster section to submit your site

3) Give google the URL and your done.

What if I remove or add categories?

 No problem this updates on the fly and requires no work from you at all. Just set it and forget it.

I tried alot of sitemap generators and they would get folders like my admin and files I did not want google to pick up. With this addon it creates a site map of only the categories on the web site. So this way I know only and all my categories are being sent to google.

See Video Below For More Information